Learning a new language is never easy. Below you will find ten common mistakes among students of English as a second language. Even if you are a native English speaker I guess you could use a reminder on some of them.
Incorrect: My sister is photographer.
Correct: My sister is a photographer.
Incorrect: It is more cold today.
Correct: It is colder today.
Incorrect: I have told you all what I know.
Correct: I have told you all (that) I know.
Incorrect: Which is the biggest city of the world?
Correct: Which is the biggest city in the world?
Incorrect: I have done a mistake.
Correct: I have made a mistake.
Incorrect: I have been here since three days.
Correct: I have been here for three days.
Incorrect: We waited one and a half hour.
Correct: We waited one and a half hours.
Incorrect: According to me, it’s a bad film.
Correct: In my opinion, it’s a bad film.
Incorrect: It’s getting winter.
Correct: It’s getting to be winter.
Incorrect: Except Angie, everybody was there.
Correct: Except for Angie, everybody was there.
Incorrect: One should not waste his time.
Correct: One should not waste one’s time.
Correct: A man / boy / girl / woman should not waste his / her time.
The indefinite pronoun one when used in a sentence should be used throughout.
Incorrect: ‘Have you a pen?’ ‘I haven’t got.’
Correct: ‘Have you a pen?’ ‘I haven’t got one.’
Got is a transitive verb. It must have an expressed object.
Incorrect: He enjoyed during the holidays.
Correct: He enjoyed himself during the holidays.
Enjoy is a transitive verb. It should be followed by an expressed object.
Incorrect: I asked for his book, but he did not lend me.
Correct: I asked for his book, but he did not lend it to me.
Some transitive verbs (e.g. give, lend etc.) should have two expressed objects.
Incorrect: The boy who does best he will get a prize.
Correct: The boy who does best will get a prize.
Incorrect: Whoever works hard he will win.
Correct: Whoever works hard will win.
Incorrect: The girl who answered the phone she was polite.
Correct: The girl who answered the phone was polite.
Incorrect: I shall see the brakes whether they work well.
Correct: I shall see whether the brakes work well.
Incorrect: He has got a new girlfriend who she works in a bar.
Correct: He has got a new girlfriend who works in a bar.
One subject or object in a clause is enough. We don’t have to use a pronoun when the noun itself is present in the clause.