If an action has extended for a specified length of time before a given future moment and possibly continues at that moment, we can use the construction “will/ shall perfective progressive infinitive”.
A.正确
B.错误
正确答案：正确
If an action has extended for a specified length of time before a given future moment and possibly continues at that moment, we can use the construction “will/ shall perfective progressive infinitive”.
A.正确
B.错误
正确答案：正确