.―I don't know whyTom was absent from yesterday's meeting.―H
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.―I don't know whyTom was absent from yesterday's meeting.―He must have been sick,___
.―,______?A.isn'the B.wasn'the C.didn'the D.mustn'the
我要详细的解析和相关知识点的详解
.―,______?A.isn'the B.wasn'the C.didn'the D.mustn'the
我要详细的解析和相关知识点的详解
![.―I don't know whyTom was absent from yesterday's meeting.―H](/uploads/image/z/16522440-24-0.jpg?t=.%E2%80%95I+don%27t+know+whyTom+was+absent+from+yesterday%27s+meeting.%E2%80%95H)
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对过去的推断.反意疑问句用过去时态.
因为有表示过去时间点的词yesterday.
have been sick的过去时态是was sick.
故选【B】wasn't he?
翻译:我不知道为什么汤姆没有出席昨天的会议.他肯定是生病了,不是吗?
他肯定是生病了,这是对昨天没有出席会议的肯定猜测,是对【过去】的肯定句反义疑问,所以要用过去式.was.
mustn't 是【禁止】的意思.
系动词不能用助动词代替.
对过去的推断.反意疑问句用过去时态.
因为有表示过去时间点的词yesterday.
have been sick的过去时态是was sick.
故选【B】wasn't he?
翻译:我不知道为什么汤姆没有出席昨天的会议.他肯定是生病了,不是吗?
他肯定是生病了,这是对昨天没有出席会议的肯定猜测,是对【过去】的肯定句反义疑问,所以要用过去式.was.
mustn't 是【禁止】的意思.
系动词不能用助动词代替.
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