she should have informed that she could not make it to the meeting
这里是指:本应该做而没做的事情,应该用:shall have done sth...
而此事应该发生在过去,所以用should,
以上希望能帮到楼主
she should have informed that she could not make it to the meeting
这里是指:本应该做而没做的事情,应该用:shall have done sth...
而此事应该发生在过去,所以用should,
以上希望能帮到楼主