Conform to

Conform to, not with

Don't say: We must conform with the rules.

• Say: We must conform to the rules.

Note: comply takes with: 

• We'll comply with your request.

Confidence in

Confidence in, not to.

Don't say: I have great confidence to you.

• Say: I have great confidence in you.

Note: In confidence: Let me tell you something in confidence(= as a secret)

Composed of

Composed of, not from.

Don't say: Our class is composed from thirty students.

• Say: our class is composed of thirty students.

Complain about

Complain about, not for.

Don't say: Annette complained for the weather.

• Say: Annette complained about the weather.

Note: when talking about illness we use complain of:

• she complained of a sore throat.

Travel by train

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

Don't say: He traveled with the train yesterday.

• Say: He traveled 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

Careful of,with or about

Careful of,with or about, not for.

Don't say: Elka's very careful for her health.

• Say: Elka'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.

Boast of / about

Boast of or about, not for.

Don't say: James boasted for his strength.

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

Believe in

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.

Ashamed of

Ashamed of, not from.

Don't say: He's now ashamed from his conduct.

• Say: He's now ashamed of his conduct.

Note: It isn't correct to use ashamed of meaning Shy. Ashamed means feeling shame or guilty about something. Shy means feeling nervous with someone. Instead of : I'm ashamed (or shamed) of my teacher, Say: I'm shy of my teacher.

Arrive at

Arrive at, not to.

Don't say: We arrived to the village at night.

• Say: We arrived at the village at night.

Note: Use arrive in with countries and large cities:

• Mr Smith has arrived in London. (or New York, India, etc.)