be afraid of 和 be afraid to
8个回答

I used to be afraid _A___big dogs,now I'm still afraid ___ big dogs.

A of; to see

B to ; of seeing

C of seeing ; to

D to ; of

be afraid to和be afraid of 意思都差不多,但是他们的用法还是有区别的:

to 后面加 动词原形

of 后面加 动名词形式也是V.-ing