1. be able to do sth. 有能力做某事;能。
Will you be able to come? 你能來嗎?
You are better able to do it than I am. 你比我更有能力擔(dān)任此事。
2. be afraid of
1) 害怕:畏懼
There's nothing to be afraid of? 沒什么好害怕的。
Are you afraid of snakes? 你怕蛇嗎?
2)恐怕
I was afraid of hurting his feeling.
= I was afraid that I might hurt his feeling. 我恐怕傷了他的感情。
另:be afraid to 擔(dān)心,不敢