不定式可在句中做什么成分?注意的地方又有哪些?答:Marx found it important to study English well.(4)作宾语补足语:在复合宾语中,动词不定式可充当宾语补足语,如下动词常跟这种复合宾语:want, wish, ask, tell, order, beg, permit, help, advise, persuade, allow, prepare, cause, force,call on, wait for, invite.(5)作定语:...
怎么区分非谓语动词是用to do 还是doing ?答:1、动词不定式可以用作目的状语。注意其他非谓语动词形式不能用作目的状语。2、only to do sth.为不定式作结果状语,表示出乎意料的结果。3、形容词或过去分词作表语时,后面可接不定式作原因状语。常见词有:happy, lucky, glad, sorry, anxious, proud, disappointed, angry, surprised, ready, ...