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he is very busy(writing)his papers.he is far too busy(to rec

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he is very busy(writing)his papers.he is far too busy(to receive)callers
busy后面只能加doing的形式吗?那后面的空为什么是to do的形式呢?求讲解
he is very busy(writing)his papers.he is far too busy(to rec
e busy doing sth忙于做某事
be busy with sth忙于某事
too+adj/adv to do sth 太(怎么样)而无法做某事
He is far too busy(to receive)callers.
他太忙了,而无法接电话.
再问: tony,would you go and see if Sam has any difficulty()his tape recorder?为什么括号里填fixing,不是have sth done吗?
再答: have difficulty in doing sth in可省略,意思为:在做某事方面有麻烦
再问: 为什么可以这么搭配啊have n in doing sth都可以认为是做某事怎么样吗?find adj to do跟这个用法一样?
再答: ??、不太懂你的意思。但是有好几个短语都有类似的用法,如: have problems doing sth have trouble doing sth 都是“在做某事方面有麻烦”,problems, trouble,difficulty都是名词 find adj to do sth是发现做某事怎么样,中间是形容词啊