问题
选择题
Bob would have helped us yesterday, but he ________.
A．was busy
B．is busy
C．had been busy
D．will be busy
答案
答案：A
A [前句表示对过去的虚拟，而but之后表示过去的客观事实，故用一般过去时态。]
搜题请搜索小程序“爱下问搜题”
Bob would have helped us yesterday, but he ________.
A．was busy
B．is busy
C．had been busy
D．will be busy
答案：A
A [前句表示对过去的虚拟，而but之后表示过去的客观事实，故用一般过去时态。]