Why Does My Child Mix Up Is/Are/Was/Were?

Sep 21, 2026
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Why does my child mix up is/are/was/were? Parents usually describe it as their child confusing is and are, or is and was, mid-sentence, and the honest answer is: because matching "to be" correctly to its subject is one of the last pieces of English grammar children lock in, not the first. It"s a real, well-documented developmental stage, not a sign your child isn"t paying attention or isn"t trying.


The Real Reason This Happens

Researchers who study how children acquire English grammar have mapped out the rough order in which different grammar rules get mastered. This ordering, first documented by psycholinguist Roger Brown and now a standard reference point in speech and language development, groups grammatical forms into early, middle, and late morphemes based on when typically-developing children reliably start using them correctly. The forms of "to be" (is, are, was, were, and especially matching them correctly to plural or past-tense subjects) sit firmly among the later-acquired forms, alongside other subtle agreement rules. The American Speech-Language-Hearing Association"s own clinical guidance on language development places contractible and uncontractible forms of "to be" toward the end of this sequence, well after simpler forms like "-ing" or plural "-s."

There"s also a specific reason the confusion looks the way it does. Children"s very first version of "to be" tends to be "is," used for almost every subject ("he is," "we is," "they is") because it"s the form they hear most often and it"s short and simple to produce. As they start noticing past-tense forms, "was" often gets applied broadly too, before a child has fully separated out when "were" is required instead. Research on how children process subject-verb agreement has even found that preschoolers, and in some sentence structures adults, can process a sentence"s meaning while genuinely not registering an agreement mismatch, which is a useful reminder that this isn"t a simple attention problem.

This pattern has a name in child language research: overregularization, where a child settles on one default form and applies it broadly before learning the exceptions. It"s the same mechanism behind a child saying "goed" instead of "went," or "runned" instead of "ran": not a sign of confusion, but a sign the child has correctly noticed that English usually works a certain way and is applying that pattern consistently, before they"ve absorbed which specific words and subjects break the pattern. "We is going" and "we was going" are the copula version of exactly the same thing, a reasonable, rule-following guess that simply hasn"t been refined yet.


What This Looks Like as It Actually Unfolds

The progression above isn"t a rule every child follows to the day, but it reflects the general shape researchers have documented: an early stage where "is" gets used everywhere, a middle stage where past tense starts appearing but isn"t yet matched precisely to the subject, and, usually somewhere around age 6, the point where subject and verb reliably agree without the child having to think about it. A child moving through these stages isn"t making random errors. They"re working through a specific, ordered piece of grammar in roughly the order most children do.


Why This Can Take Longer in Multilingual Indian Households

Many Little Genius families are raising children across two or three languages at once, a mother tongue, often Hindi, plus English, and sometimes a regional language too. Research on language acquisition in India describes this multilingual trajectory as the typical pattern for Indian children, not an unusual case. A child juggling more than one grammar system at a time is doing genuinely more cognitive work than a child acquiring English alone, since each language marks subjects, tense, and agreement differently, so it"s entirely normal for "is/are/was/were" to take a little longer to fully settle for a multilingual child than the general research timeline above might suggest. That"s not a delay to worry about on its own. It"s the expected shape of grammar development when a child is building more than one language system in parallel.

This whole pattern is really just subject verb agreement for kids, playing out gradually and predictably rather than randomly.


What This Means for How Parents Should Respond

Because this is a developmental stage rather than a discipline issue, the most useful response isn"t repeated correction in the moment, which tends to interrupt a child mid-sentence without actually speeding up the underlying process. What helps more is exposure and gentle modeling: repeating the sentence back correctly in the natural flow of conversation ("Yes, we were going to the park, what did you see there?") without turning it into a lesson. Over time, hearing the correct form modeled consistently, alongside a child"s own natural grammatical development, is what closes the gap.

Reading aloud together helps for a related reason: picture books and early readers are a steady, low-pressure source of the correct forms, heard again and again in context rather than as a rule to memorize. Narrating your own actions out loud in correct form ("I was just putting the kettle on, now I am waiting for it to boil") gives a child the same exposure without singling out anything they"ve said. Both work through the same mechanism as direct modeling: repetition of the correct pattern, at a pace the child isn"t being tested on.


How Little Genius Teaches This

Little Genius Academy"s Grammar program, part of the English Enrichment Program, is built around exactly this kind of real developmental sequencing rather than a fixed worksheet order. A one-on-one teacher can hear precisely which stage a child is at with subject-verb agreement and similar rules, and reinforce the correct pattern through natural conversation and guided practice, at the pace that specific child is ready for, rather than moving the whole class on regardless.


Frequently Asked Questions

At what age should my child stop mixing up is/are/was/were?
Most children move through this fairly consistently by around age 6, though the exact timing varies. What matters more than a fixed age is that the pattern is a genuine, ordered stage, not a random error a child needs to "concentrate harder" to avoid.

Should I correct my child every time they say it wrong?
Constant in-the-moment correction is generally less effective than modeling the correct form naturally back to them in conversation. Repeated interruption can make a child more hesitant to speak without necessarily speeding up how quickly the grammar rule settles in.

Is this different for children learning English alongside another home language?
The underlying developmental pattern is similar, but children building English alongside a language like Hindi or a regional language are managing two grammar systems at once, so subject-verb agreement can genuinely take a little longer to fully settle. It"s still a normal part of the process, not a red flag on its own, and it usually resolves the same way: through consistent modeling rather than correction.

How do I know if this is a normal stage versus something that needs more support?
A useful marker is whether the pattern is gradually improving over months, even if slowly. A one-on-one teacher can also flag it clearly during a diagnostic session if something looks outside the typical developmental range.



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