问题标题：
1.----Eachofthemhadatry,__________(didn't,he）为什么用he?2.---LearningEnglishwelltakesalongtime,_____,_____(doesn't,it)3--Theymusthavecleanedtheclassroom____,___(haven't,they)为什么不用mustn't4.---Theythinkwearefrom
问题描述：
1.----Eachofthemhadatry,__________(didn't,he）为什么用he?
2.---LearningEnglishwelltakesalongtime,_____,_____(doesn't,it)
3--Theymusthavecleanedtheclassroom____,___(haven't,they)为什么不用mustn't
4.---Theythinkwearefromshanghai___,___(don'tit)为什么不用aren't
5.---Don'tgivehertoomuchfood_____,_____(will,you)怎么不用he?
曹娟回答：
1、主语是eachofthem,单数第三人称,在不确定男女的时候就用he泛指,这个和中文是一样的.2、很明显,注意不是“人”,所以用it.3、must表示估计,猜测,意为“他们应该已经把教室打扫干净了吧”,真正的动词是havecleane...
