must have done 表示的是對過去動作進行推測,其反義疑問句的構(gòu)成有兩種：didn't .../wasn't(weren't) .../haven't(hasn't)...這兩種形式的選擇取決于句子中的時間狀語.比較一種簡單的方法是：不把它看成是推測,就把它看成是一種事實.
比如：He must have been to Beijing,hasn't he?
You must have been late for school yesterday,wasn't you?
換句話說,用過去時還是用現(xiàn)在完成時來進行反問的區(qū)別,等同于過去時和現(xiàn)在完成時的區(qū)別.
又如：It must have rained last night,didn't it?
They must have done their homework yesterday,____?
They must have done their homework yesterday,____?
這個句子的反意疑問句為什么是didn't they呢?
這個句子的反意疑問句為什么是didn't they呢?
英語人氣：840 ℃時間：2020-03-21 02:07:12
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