关于afraid 和 fear

e afraid of 后可跟名词或动名词,be afraid 后可跟动词不定式,此语的含义是“怕”或“不敢”,be afraid 后可跟that从句,其含义是“恐怕”.
例句：I'm very much afraid I can't.
fear 可以用作动词,也可以用作名词,其含义也是“怕”,但口语中多用be afraid of.例如：Don't fear the dog.这句话虽正确,但口语中都说Don't be afraid of the dog.此外,fear that…表示“担心”,稍异于be afraid….