Believe in, not to

Don’t say: We believe to God.

Say: We believe in God.

NOTE:  To believe in means to have faith in. To believe (without the in) means to regard something as true: I believe everything he says.

 Boast of or about, not for.

Don’t say:  James boasted for his strength.

Say:  James boasted of (or about) his strength.

 Careful of, with or about, not for.

Don’t say: Elke’s very careful for her health.

Say: Elke’s very careful of/about her health.

Or: You should be more careful with your money.

NOTE: Take care of: He takes care of his money.

 Travel by train, etc., not with the train, etc.

Don’t say: We travelled with the train yesterday.

Say: We travelled by train yesterday.

NOTE: We say: by train, by boat, by plane, by bike; also, by land, by sea, by air, by bus; in a bus or on a bus; by car or in a car, by taxi or in a taxi; on horse-back, on a donkey, on a bicycle; on foot.

 Complain about, not for.

Don’t say: Anne complained for the weather.

Say: Anne complained about the weather.

NOTE:  When talking about illness we use complain of. We say: She complained of a sore throat.