12 common grammar mistakes in spoken English, and quick fixes

The most common grammar mistakes in spoken English are small and repeated: a missing "a" or "the", "since" where English wants "for", the wrong tense with a finished time, questions without the helping verb moved, "-ing" on verbs like "know" and "have", and extra words such as "discuss about" or "return back". Fixing the handful you make most often does more for how you sound than learning a hundred new rules.

This guide lists the 12 slips listeners notice most, each with a one-line rule, a weak and a better sentence, and a line to say aloud. At the end you will find a simple way to catch your own mistakes while you speak, without freezing mid-sentence.

Why is spoken grammar harder than written grammar?

On paper you can stop, reread and fix. When you speak, you are choosing ideas, words and grammar at the same time, at about two words a second. Your brain falls back on the patterns it has said most often, and if those patterns are slightly off, they come out first. That is why someone can score well in a grammar test and still say "I am knowing him since college" in conversation.

The fix is the same for everyone, whatever your first language: notice your two or three habits, learn the correct version as a whole chunk, and say it aloud until it becomes the new default.

The list below is ordered roughly by how often these slips turn up in everyday speech. The first few appear in almost every conversation, so they are worth checking first. The later ones are less frequent, but each is a fixed phrase that is quick to learn once you have noticed it. You do not need to work through them in order: skim the list, mark the two you recognise in your own speech, and start there.

What are the most common grammar mistakes in spoken English?

1. Missing "a", "an" and "the"

Rule: a singular countable noun needs a word before it: a, an, the, my, this.

2. "Since" and "for"

Rule: for + a length of time (two years, a week); since + a starting point (2022, Monday, childhood).

3. Present perfect with a finished time

Rule: when you say when it happened (yesterday, in 2020, last week), use the past simple, not "have done".

The present perfect is for the experience or result without a time ("I've been to Goa"); the past simple tells the story with a time ("I went last December"). Our guide to the English tenses you need for speaking goes further.

4. Questions without the helping verb moved

Rule: in a question, the helping verb (is, are, do, did, have, can) comes before the subject.

Questions are such a common trouble spot that we wrote a whole guide on how to ask questions in English.

5. "-ing" on state verbs

Rule: verbs for states, not actions, stay simple: know, understand, believe, want, need, like, own, and "have" when it means possess.

6. Forgetting the -s after he, she and it

Rule: in the present simple, add -s after he, she, it and one person or thing: he works, she lives, it costs.

7. "Did" plus a past form

Rule: after did or didn't, the verb goes back to its base form. "Did" already carries the past.

8. Uncountable nouns with -s

Rule: some nouns are uncountable in English and never take -s or "a": information, advice, feedback, luggage, furniture, equipment, news.

9. Extra prepositions: "discuss about", "reach to"

Rule: some verbs take their object directly, with no preposition: discuss, reach, enter, attend, answer, contact, marry.

10. Prepositions of time: in, on, at

Rule: at a clock time, on a day or date, in a month, year or part of the day.

11. Doubled words: "return back", "repeat again"

Rule: some verbs already contain the meaning of "back" or "again", so adding it says the same thing twice.

12. "Myself" instead of "I" or "me"

Rule: use "myself" only when you do something to yourself ("I hurt myself") or for emphasis ("I did it myself"). Not to introduce yourself.

How can you correct your grammar while you speak?

You cannot check every word in real time, and trying to will make you freeze. Instead, train your ear in practice so the right form comes out on its own in conversation:

1. Record one minute a day. Talk about your day, your job or your plans for the weekend.
2. Listen for only two mistakes. Choose two from the list above and count how often they appear. Ignore everything else for now.
3. Say the correct version three times. Out loud, as a whole sentence, not just the word you got wrong.
4. Re-record the same topic. Your aim is fewer of your two mistakes, not a perfect minute.
5. Switch after a week. When your two mistakes are rare, pick the next two.

When you do catch a mistake mid-sentence in real conversation, just fix it and carry on: "I didn't went… didn't go there." Quick self-corrections sound natural, and native speakers do them all the time. What sounds unnatural is stopping completely to think about grammar.

Some mistakes come from your first language, and knowing the cause makes them easier to fix. If you speak Hindi, read English mistakes Hindi speakers make; for Gujarati, see English mistakes Gujarati speakers make. And our English tenses guide shows how each tense is built, with spoken examples.

Common questions about spoken English grammar