From first words to full conversations, knowing what’s normal isn’t always easy.

Young girl talking outdoors beside a wooden fence

Most of us know the headline milestones: first word, first little sentence, the moment “no” becomes a complete philosophy of life. What is much harder to judge is everything that happens after that.

Between two and four, speech and language change at extraordinary speed. Children go from simple phrases to proper back-and-forth conversations, endless questions, stories, jokes and increasingly elaborate negotiations about why bedtime should not apply to them. Yet after the two-year developmental review, there is often no obvious follow-up before school. A lot happens in that gap, and most parents are left to work out for themselves what is typical, what is simply their child’s own pace and what might need a little more attention.

Covid showed us, on a scale we had never really seen before, just how much language development depends on social interaction. When nursery, playgroups, grandparents, friends and everyday contact suddenly disappeared, children lost far more than routine. They lost different voices, faces, conversations, games, turn-taking and the constant little exchanges that help language develop.

And we saw the impact. Children emerging from the pandemic showed more difficulties with speech, language and communication, with early-years settings reporting limited vocabularies, less confidence speaking and increased need for support.

For children without siblings, the loss of other children was even more stark. Those with brothers or sisters at least still had someone to copy, chatter to, argue with and negotiate over the blue cup. It was a huge reminder that children do not learn language simply by hearing enough words. They learn it through people — through watching, listening, playing, responding, being misunderstood and trying again.

“Sometimes the first sign isn’t silence. It’s everyone else looking at you for subtitles.”

The harder part is recognising when things are not developing quite as expected in your own child. I know because I missed it in mine.

My firstborn had passed his two-year developmental check, so nothing had flagged as a concern. I was also the first of my friends to have children, which meant I had almost no real-life comparison for what a toddler was supposed to sound like. He wasn’t especially chatty, but I took that as personality rather than delay.

Other people often struggled to understand him, while I rarely did. At the time, I honestly thought they simply didn’t understand toddler. Add in the fact that he was extremely bright, could already read, and that my mum told me my brother had also been a late talker, and it all felt reassuringly normal.

It wasn’t until school referred him for speech therapy at five that I realised there had been two issues all along: he had been talking less than expected and his speech was far less clear than it should have been.

First-time parenthood makes this particularly tricky. Books can tell you roughly when to expect a first word, but they cannot give you the comparison you suddenly have with child number two or three: remembering how much an older sibling talked at the same age, how clear they were, how they built sentences or how easily other people understood them. With your first, you are learning what child development looks like at exactly the same time they are doing it.

So once that first word has arrived and your child is very definitely talking, what should actually be happening next?

What Actually Changes Between Two And Four?

The jump between two and four is not simply “more words”. It is the difference between “more juice” and a detailed account of who pushed whom at nursery, why it definitely wasn’t their fault and what they believe should happen next.

By two, children will usually be saying 50 or more words and starting to put two or three together. Plenty of those words may still be unclear.

By three, they are typically putting four or five words together into short sentences, asking lots of questions and starting to use simple grammar. People who know them should generally be able to understand most of what they say, even though trickier sounds are still developing.

By four, conversation has moved on again. Children are usually using four-to-six-word sentences, linking ideas with “and”, talking about the past and future and beginning to answer “why” questions. Grammar is still very much a work in progress — “runned” and “goed” are perfectly normal — but language should be becoming richer, more organised and easier to follow.

Speech and language are not one neat skill moving forward in a straight line. A child can understand almost everything, know hundreds of words and still be difficult to understand. Another can pronounce words beautifully but say surprisingly little. Another might have plenty to say but struggle to get the words into the right order or build sentences that make sense.

It helps to think about several things separately: how much they talk, how they build sentences and use grammar, how clear their speech is, how much language they understand and how they use it socially — taking turns, asking and answering questions, joining conversations and explaining themselves when someone has not understood.

Which is why “but they can talk” does not really answer the question.

What Helps Speech And Language Develop?

The good news is that supporting language does not require flashcards, an expensive subscription box or a living room that looks like a Scandinavian nursery catalogue.

Language grows in ordinary life: bath time, books, snack negotiations, pretend shops, singing in the car and being asked the same question seventeen times before breakfast.

Two young girls talking together outdoors by a wooden fence

If your child points at a dog and says “dog”, you might naturally answer, “Yes, a big brown dog.” You have taken their word and gently stretched it into something richer. If they pronounce something incorrectly, there is usually no need to stop the conversation and make them repeat it perfectly; simply use the correct word naturally in your reply.

It can also help to ease off the constant questioning. “What’s that? What colour is it? How many can you see?” can turn a perfectly nice walk into a small oral examination. Comment on what they are interested in, follow their lead and leave a little space for them to respond.

Reading together is brilliant, but so is cooking dinner, getting dressed, walking to the shops or listening to an extremely long story involving a dinosaur, a digger and absolutely no discernible ending.

It is worth thinking about who your child spends time with too. If they do not attend nursery, have no siblings or spend most of the week with the same one or two adults, widening the cast a little can give them different kinds of practice. Playdates, toddler groups, library sessions, swimming lessons or another regular activity can mean hearing different voices, copying other children, negotiating play and having to make themselves understood by somebody who has not spent two years learning their personal dialect.

That does not mean an only child needs the diary of a minor royal. Regular opportunities to mix with other children are enough.

Some conversations are also worth having when your child can actually see you. Not because they need to maintain eye contact, and certainly not because every conversation has to happen sitting opposite one another. But children also pick up meaning from expressions, gestures and mouth movements. Talking while unloading the dishwasher still counts; sitting together over a book or playing on the floor simply gives them another layer of information to work with.

One of the useful things the post-Covid years reinforced was just how valuable those basics are: conversation, reading, role play, time with other children and plenty of face-to-face interaction. None of it sounds revolutionary, which is rather the point. These are the ordinary things doing far more developmental heavy lifting than we tend to give them credit for.

When Is It More Than Just Their Own Pace?

The first clue is not always silence. Sometimes it is simply that everybody else looks at you for subtitles.

Parents become extraordinarily good at deciphering their own children. You know the context, the favourite toys, the half-words and exactly what a particular sound means when accompanied by a point towards the fridge. That can make speech clarity surprisingly hard to judge from inside the family.

Amount of speech matters too. By three, children will usually be joining several words into short sentences rather than communicating mainly with single words or gestures. If language remains very limited or does not seem to be moving forward, that is worth raising with someone.

Then there is how those words are put together. Preschool grammar is supposed to be imperfect — “runned” and “goed” are very normal — but sentences should gradually become longer and more organised. A child who knows plenty of individual words but is still struggling to combine them, regularly puts words in an order that makes sentences hard to follow, or seems unable to move beyond very simple phrases may need a little extra support.

For example, there is a difference between a three-year-old saying something like “Mummy go shop now” — still developing, but clearly structured — and a child of the same age whose speech is consistently so jumbled that even familiar adults struggle to work out what they are trying to say. It is the overall pattern and lack of progression that matters, not the occasional gloriously mangled sentence.

Clarity is another piece. By three, people who know them should generally understand most of what they say, even though more complicated sounds can still be difficult. If you are routinely translating for grandparents, friends or nursery staff, that is useful information rather than proof that everyone else simply needs to listen harder.

Understanding language is separate again. A child may be talking but still struggle to understand age-appropriate words, questions or sentences.

Two preschool-age girls playing together in long grass outdoors

And socially, conversation should gradually become more reciprocal. By the preschool years, children are increasingly asking and answering questions, talking about themselves, joining other children’s play and using language to negotiate what happens next. By four, they are also beginning to talk about past and future events and give a more coherent account of what has happened.

No single mispronounced word, grammatical quirk or quiet spell means there is a problem. The bigger question is whether speech and language are continuing to move forward.

Sometimes the best reality check is somebody who does not already speak fluent your child. Ask nursery what they are hearing. Ask a grandparent whether they can genuinely understand most of what is being said. If you find yourself constantly translating, take note rather than assuming everyone else needs to listen harder.

Who Do You Speak To If You Are Worried?

You do not have to wait for Reception, a teacher or a particularly blunt relative to point it out. If your child goes to nursery or preschool, start there. Early-years staff spend their days with children of roughly the same age, which gives them a comparison most parents simply do not have. Ask whether they have noticed the same thing: less speech, unclear speech, jumbled sentences or difficulty keeping a conversation going.

You can also speak to your health visitor or GP. Speech and Language UK advises parents to raise concerns with a health visitor, GP or childcare provider, and depending on where you live you may also be able to approach an NHS speech and language therapy service directly.

Hearing is worth checking too. A child does not need to seem obviously deaf for reduced hearing to affect speech. Glue ear is common in young children and can cause temporary hearing loss; if it persists, the NHS says it can affect speech development.

A speech and language therapist can then work out what is actually happening. The issue may be speech sounds and clarity, the amount of language a child is using, sentence construction, understanding, social communication or a combination of several areas.

Getting an assessment is not the same as deciding there is a diagnosis. It is simply asking someone who knows what they are listening for to listen.

And if there is one thing I wish I had understood the first time around, it is that being ahead in one area does not mean a child cannot need support in another. Sometimes the strengths are exactly what make the struggle easier to miss.