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同學(xué)們在使用 have to 時必須弄清它的真面目,否則容易出錯。 5. It was not until he came back that I went to sleep Not until he came back did I go to sleep. 3. We had to wear our jackets and boots… have to 是一個比較特殊的情態(tài)短語,雖然也具有情態(tài)動詞的功能,但卻與其他的情態(tài)動詞不同。 (表示 9點前一直在學(xué) ) 2. I did not study English until 9 o’clock last night. 我咋晚直到 9點鐘才學(xué)英語。用在否定句中,主句中的謂語可以是延續(xù)性的也可以是短暫性動詞。用在肯定句中,句子的謂語動詞必須是可延續(xù)性的。例如: Your bag is twice as expensive as mine. 你的袋子比我的貴一倍。例如: This dictionary is not as/so useful as you think. 這本字典不如你想象的那樣有用。 (2) Your pen writes as smoothly as mine. 你的鋼筆書寫起來和我的一樣流暢。其基本結(jié)構(gòu)為: as+ adj./ adv. +as。s so much fun t