英语中的简单句：主+谓+宾
与之类比,英语的从句也应该有这样完整的结构.
从句分为好几种,有定从,宾从,主从,状从……
eg,定从：She is a pretty girl who is popular amoung our class.
宾从：It is where I disagree.
主从：What I like is food.
状从:I listen to the teacher carefully ,concentrating on what the teacher say.
……还有好多好多,分析从句,重在分析句子结构
上图中,应该是as soon as the program end
再问： 那宾语一定要有吗？
再答： 差不多吧，不过你可能要注意 主系表：I feel tired.
上面打错了，应该是as soon as the program ends.
