本体选择什么( )1. It ______ 3 years since he left us.( )1. It ______ 3 years since he left us. A. is B. has been C. was D. were

来源:学生作业学帮网 编辑:学帮网 时间:2024/07/11 14:38:57

本体选择什么( )1. It ______ 3 years since he left us.
( )1. It ______ 3 years since he left us.
A. is B. has been C. was D. were

选B,因为本句中有since一词,是现在完成时的标志词.

b

A

has been ,后面的since是一个标志

B. has been

B
since只能用于完成时态里

B