主系表后接什么动词有一句是 he is happy to hear that.还有一句是 he is busy playing computer.两句都是主系表结构,但后面的动词却一个是不定式,另一个是动名词.这是怎么回事?

主系表后接什么动词有一句是 he is happy to hear that.还有一句是 he is busy playing computer.两句都是主系表结构,但后面的动词却一个是不定式,另一个是动名词.这是怎么回事? enough+动词什么形式动词什么形式?:He is not old enough ___(go) to school 是he is puts on还是he is put on?wear是动词么?he is put on和he puts on有什么区别 He is on the way .后面跟动词不定是还是什么? He is lucky to win the first prize.这句话中的动词不定式作什么成分, Is he lying on the grass?和Does he lie on the grass?有什么不同?是不是be动词和助动词都可以提问实义动词 He is taking bus 主语是he 那动词是什么 He is reading.is是助动词还是联系动词? He is reading.is是助动词还是联系动词? He often+ 动词.那个动词用什么形式, He后面接什么be动词 he后放什么be动词? he is easy to get along with中的to get along with是动词不定式做什么成分? he is difficult to get along with 这句话的动词不定式做什么成分?可以换成动名词吗? 接在系动词后的形容词做什么成分如He got angry./He is good.angry和good做什么成分 Neither he nor I am going there和Neither I nor he is going there 这两句有什么不一样.是谓语动词不一样吗? he is 后的动词加s吗 he is后动词是加ing还是S为什么?