10 English Grammar Rules That Every Non-Native Speaker Should Know

English grammar can be tricky for non-native speakers. Here are 10 essential rules that will immediately improve your writing.

1. Subject-Verb Agreement

Singular subject = singular verb. “The report is ready.” Not “The report are ready.”

2. Article Usage (A/An/The)

Use “a” before consonant sounds, “an” before vowel sounds. Use “the” for specific things.

3. Prepositions of Time

At for specific times (at 3 PM)
In for months/years (in June)
On for days/dates (on Monday)

4. Countable vs Uncountable Nouns

“Much information” (not “many informations”). “Many books” (not “much books”).

5. Correct Tense Sequences

When talking about the past: “I realized that I had made a mistake.”

6. Active Voice Over Passive

Active: “The team completed the project.” (Stronger)
Passive: “The project was completed by the team.” (Weaker)

7. Comma Usage in Lists

Use the Oxford comma: “apples, oranges, and bananas.” (The comma before “and” is optional but recommended.)

8. Its vs It’s

Its = possessive (the company and its employees)
It’s = contraction of “it is” (it’s important)

9. Parallel Structure

Keep items in a list grammatically consistent. “I like swimming, running, and to bike” should be “I like swimming, running, and biking.”

10. Modal Verbs

Can, could, may, might, shall, should, will, would. Never add “to” after modals: “I can go” not “I can to go.”


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