例:I haven't met that professor prior to today.(以前我从未见过那位教授。) 4. 现在完成进行时(have been doing) 用法:表示某一动作开始于过去某一时间,延续或重复地出现至今,或将继续延续至将来。 例:We have been working on this project for over a month now...
For this reason, I have decided to take practicing medicine as my future career.25. 我们有理由相信…We have reasons to believe (that)从句 例：我们有理由相信体罚应该严格禁止...
A. supposed to have been written B. supposed to be written C. supposing to have been written D. supposing to be written 4. The money with which you were to buy dog food is gone, but Spot looks so hungry! 让你们用来买狗食的钱已经花光了,可是斑点看上...
1. 介词使用(of/to/in…) 课堂回顾: 过中秋节的习俗于唐代早期在中国各地开始流行。 过中秋节的 习俗 于唐代早期 在中国各地 开始流行。 习俗 过中秋节的 开始流行 于唐代早期 在中国各地 。 The tradition of celebrating mid-autumn day became popular at the begi...
2) 情态动词 除ought 和have 外,后面只能接不带to 的不定式。 3) 情态动词没有人称,数的变化,即情态动词第三人称单数不加-s。 4) 情态动词没有非谓语形式,即没有不定式,分词,等形式。 比较can 和be able to 1)can could 表示能力;可能(过去时用could), 只用于现在式和...
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