have has had和am is are 6个得用法分别是什么?
have has had和am is are 6个得用法分别是什么?
has,have,had用法
用am,is,are,have,has填
用have has am is are填空
用am is are have has 填空
用"am,is ,are,have,has"填空
用am is are have has填空
英语中的am is are用法和情态动词是什么?
请问HAS BEEN和 HAVE BEEN HAD BEEN的用法以及分别加DONE后的用法
用to have或am,is are,have,has填空
have、had、has的区别与用法是什么?
have has had或 having +been 的区别和用法