搜狗做题网用had to 或 must have been填空.
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用had to 或 must have been填空.
He didn't come to work yesterday.He ____ill.
He didn't come to the office this morning.He ______stay at home.
I don't think she was Austrian.She _____German.
I lost my pen so I _____buy a new one.
He forgot his case so he _______ return home.
She didn't hear the phone.She _____sleeping.
请说说他们有什么区别.
He didn't come to work yesterday.He ____ill.
He didn't come to the office this morning.He ______stay at home.
I don't think she was Austrian.She _____German.
I lost my pen so I _____buy a new one.
He forgot his case so he _______ return home.
She didn't hear the phone.She _____sleeping.
请说说他们有什么区别.
1,must have been 虚拟语气,表推测,意思是一定
2,had to 因为没有推测的意味,表是原因,意思是不得不
3,must have been 可以翻译过来试试就知道了.因为不可能有“不得不是某国人”这样的句子的.所以只能是推测某人可能是某国人.
4,had to 前面说出了原因,后面就“不得不”这样做了.“他把方案忘在家了,所以他不得不回云取.”这里也没必要推测,因为“他”不得不这样做.
5,must have been这是对为什么没听见电话的一种推测,她不可能“不得不”在睡觉.
总之：虚拟语气表示推测,而且很强烈,而had to表示非此不可,不必推测.
2,had to 因为没有推测的意味,表是原因,意思是不得不
3,must have been 可以翻译过来试试就知道了.因为不可能有“不得不是某国人”这样的句子的.所以只能是推测某人可能是某国人.
4,had to 前面说出了原因,后面就“不得不”这样做了.“他把方案忘在家了,所以他不得不回云取.”这里也没必要推测,因为“他”不得不这样做.
5,must have been这是对为什么没听见电话的一种推测,她不可能“不得不”在睡觉.
总之：虚拟语气表示推测,而且很强烈,而had to表示非此不可,不必推测.
用had to 或 must have been填空.
完成以下句子,用had to或must have been填空.
.完成以下句子,用had to或must have been填空.
用must或have to填空
用have to或must填空.
用have/has been to,have/has gone to或have/has been in填空
用can,can't,must或have to 填空
用have to的适当形式或must填空
用括号里的正确形式填空和句型转换(用must have been/done 或can't have been/done改
用would,should,must ,have to 填空
用have to 和must 填空.
用must have been/done或can*t have been/done 改写句子