有 is,am,are,was,were,being,been,to be
补充:
be 英 [biː] 美 [bi] 是
双语例句
1.This is happening in every school throughout the country
全国各地每所学校都在发生这样的事情。
2.Forensic experts were called in
法医专家被请来。
3.Then he received a phone call that was to change his life
然后,他接到一个将改变他一生的电话。
4.It was too chilly for swimming
这时候游泳太冷了。
5.Clearly there is a problem here
显然,这里出了个问题。
IS AM ARE BEEN 就这些没了
望采纳