PLEASE COME IN
PLEASE COME IN1-Why I couldn't get you on the phone this morning.-we __tennis in the yard when you phoned me.A must be playing B must have been playing2-do you still remember when we went to the Great Wall?-I can't remember it well,but __it have been sometime last Maya should b could 嘎,两题都应该是B，但为什么呀1ses340403说------B,(表示过去正在发生的事) A不能表示过去正在发生的事吗？
最佳回答
稳重的小蘑菇
2026-03-30 12:45:29
1-Why !I couldn't get you on the phone this morning。-we __tennis in the yard when you phoned me。A must be playing B must have been playing only must have been doing indicates what was happening in the past。。A is not correct in that it indicates only what is happening ,not what was happening 2-do you still remember when we went to the Great Wall?-I can't remember it well,but __it have been sometime last May a should b could Here,the person who responded does not have any certainty with respect to the statement。Thus could is used,whereas should imples a certain degree of certainty
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2026-03-30 12:45:29爱撒娇的奇异果
回复1-Why !I couldn't get you on the phone this morning。-we __tennis in the yard when you phoned me。A must be playing B must have been playing only must have been doing indicates what was happening in the past。。A is not correct in that it indicates only what is happening ,not what was happening 2-do you still remember when we went to the Great Wall?-I can't remember it well,but __it have been sometime last May a should b could Here,the person who responded does not have any certainty with respect to the statement。Thus could is used,whereas should imples a certain degree of certainty
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