we should be strict in our study 为什么be动词要是原形?详

we should be strict in our study 为什么be动词要是原形?详 We should be strict-----in study.A.myself B.our own C.oursel We should be strict-----in study. A.myself B.our own C.ourse 为什么问句的be interested in后接动词原形 We should be our motherland strict with our study 还是 strict in our study Shall we be back in time-----这句子中为什么要加be（我不是问：为什么要用be 动词原形）! I am afraid we shall be late.为什么要用be动词原形? be strict with in be strict in 这里为什么直接用动词原形 be be+动词原形?