安14U
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主系表比如I felt very tired.这句话feet是动词,very tired是表语,feel very tired是谓语。 那He was happy to be among the firends again。he was happy是整个句子的主语,he是主语中的主语,was是系动词,happy是表语,was happy是谓语。to be among the firends again是表语从句,这里没有主语,当主语是he,那就是he was among the firends again,was among the firends应该就是谓语了。这里我不懂了:这里的to是干嘛的