一、be afraid of的含义及用法介绍
be afraid of意为怕、生怕、恐怕，后接doing/sth。
例句：There's no need to be afraid of him ─ he's a big softie.
Don't be afraid of speaking up
It is common for children to be afraid of sleeping alone.
She might not be afraid of implicating her sister.
It's very healthy to be afraid when there's something to be afraid of.
I won't be afraid of you, distance and time.
I think he must be afraid of coming here.
二、be afraid to的含义及用法介绍
be afraid to意为怕，是主观上的原因，后接to do。
例句：Shop in small local markets and don't be afraid to bargain.
If your original request is denied, don't be afraid to pursue the matter.
He thinks that some workers may be afraid to put questions publicly.
Don't be afraid to ask for advice about ordering the meal
Don't be afraid to star with articles of lower grade levels.
Don't be afraid to study and explore English language.
I never be afraid to find a job and work.