A.
Many verbs have the structure verb + preposition (in/for/about etc.) + object. For example:
verb + preposition + object
We talked about the problem.
You must apologize for what you said.
If the object is another verb, it ends in ~ing:
verb + preposition + ~ing (object)
We talked going to America.
She apologized for not telling the truth.
Here are some more verbs with this structure:
succeed (in)
Have you succeeded in finding a job yet?
insist (on)
They insisted on paying for the meal.
think (of)
I’m thinking of buying a house.
dream (of)
I wouldn’t dream of asking them for money.
approve(of)
She doesn’t approve of gambling.
decide (against)
We have decided against moving to London.
feel (like)
Do you feel like going out tonight?
look forward (to)
I’m looking forward to meeting her.
We say ‘apologize to somebody for…’:
* She apologized to me for not telling the truth. (not ‘she apologized me’)
B.
With some of the verbs in A, you can use the structure verb + preposition + somebody + ~ing:
verb + preposition somebody + ~ing
She doesn’t approve of me gambling.
We are all looking forward to Liz coming home.
C.
The following verbs can have the structure verb + object + preposition + ~ing:
verb + object + preposition + ~ing
congratulate (on)
I congratulated Ann on passing the exam.
accuse (of)
They accused me of telling lies.
suspect (of)
Nobody suspected the man of being a spy.
prevent (from)
What prevented him from coming to see us?
stop (from*)
The police stopped everyone from leaving the building.
thank (for)
I forgot to thank them for helping me.
forgive (for)
Please forgive me for not writing to you.
warn (against)
They warned us against buying the car.
You can also say ‘stop somebody doing’ (without from). So you can say:
* You can’t stop me doing what I want. or… stop me from doing what I want.
Some of these verbs are often used in the passive. For example:
* I was accused of telling lies.
* The man was suspected of being a spy.
* We were warned against buying the car.