恩,我想想,这么多吧,你看: 1,使役动词make,let,例如:Let's me help you. 2,助动词does(现在),did(过去)后必须跟原形 3,动词不定式=to+动词原形.例如:He runs to get there. 他跑步去那里。 get是动词,前面有一个动词run,这里就只能用to get. 4,情态动词can ,may ,must 5,表示将来的will和be going to
do sth 4祈使句please do ,不定式to do后也须接动原 虽然你只须初中的,但先记着先也没坏其实有句口诀的,方便你记忆 i drop caps—— insist(坚持) desire(渴望)/demand(命令)request(请求) order(命令)prefer(宁愿) command(命令)advise(建议)suggest(建议) 以上全都是+(should)[可省]+v(动原) 另外,情态动词如 can may must would should,对你以后会很有用的~ 1情态动词should must can shall may 2let 3动词不定式 see sb. do sth. hear/help/..;.