It can be tiresome to be many things at the same time.
请问老师这里的to be 是不是可以理解为to do,但为什么这里不只用to do,这是什么语法现象?
It can be tiresome to be many things at the same time. 原句是不是漏掉了 doing?
It can be tiresome to be doing many things at the same time.
这样,是进行体的不定式短语作主语。
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