比如:want to do sth (想要干某事) 定冠词前面要加the,序数词前面要加the,某一种乐器前面要加the,比如play the piano (弹钢琴) decide to do sth (决定干某事) finish doing sth (完成干某事) be pleased to do sth (高兴干某事) It's +形容词+for sb+to do sth (对某人来说,干某事是.的) Let sb do sth (让某人干某事) make sb do sth (使某人干某事) need to do sth (需要干某事) like doing sth (喜欢干某事,表经常性) like to do sth (喜欢干某事,表间歇性) 修饰something,anything,nothing 的词语要放在它们的后面,例如:something important 修饰enough的词语要放在它的前面,例如:big enough( 足够大) 如果一句话是以动词开头,则动词就要加ing