AS a teahcer ,i always tell my studens ( ) hard and keep up from _英语解答

AS a teahcer ,i always tell my studens ( ) hard and keep up from day one .空里面是填to work,
为什么不可以填work

人气：458 ℃　时间：2019-12-06 18:06:12

解答

tell sb.to do sth.这是其一；其实最重要的问题是你直接填了work一个句子中就会出现两个动词了.英语中一句话中只允许有一个动词.所以后面是work的不定式：to work