they exercise every day to stay healthy问题为什么要用to stay 为什么要用动词不定式?

They exercise every day.（改为否定句） They exercise a lot every dayThey ____ ____ a lot every day They'd like to do some exercise every morning(改为同义句和疑问句) Their teacher usually gives them many --------(exercise)every dayBut they want to do much ---------(exercise)outside.用所给词的适当形式填空 Their teacher usually gives them many --------(exercise)every day.But they want to do much ---------(exercise)outside.用所给词的适当形式填空 they exercise every day to stay healthy问题为什么要用to stay 为什么要用动词不定式? they like to exercise 还是they like to do exercise exercise,they,on,always,weekends(.) We should exercise every day对exercise提问 I exercise every day同意句I exercise every dayI —— ——every day how long do you exercise every need you exercise every day?怎么回答 It's good for exercise every you should take e-- exercise every day. we should get (e ) exercise every day we must t____to exercise every day. I exercise every day怎么读 对 because she exercise every day提问