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用句型before……

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一、生活习惯类

1. Before we used to get up early, now we do not do that any more.

(我们以前习惯早起,但现在不再这样做了。)

2. Before doing my homework, now I must go back home first.

(我以前做作业前不用先回家,现在必须先回家。)

二、能力变化类

1. Before I could ride a bike, now I can cycle every day.

(我以前不会骑自行车,现在每天都会骑。)

2. Before I liked art, now I enjoy drawing pictures on weekends.

(我以前不喜欢美术,现在周末常画画。)

三、时间描述类

1. It will be 3 months before the project is completed.

(项目完成前还有3个月时间。)

2. Before the meeting started, we had already discussed the agenda.

(会议开始前我们已经讨论了议程。)

四、其他用法类

1. Before the movie started, we ran out of popcorn.

(电影开始前我们爆米花吃完了。)

2. Before the letter arrived, I had already finished my homework.

(信件到达前我就写完了作业。)

注意事项:

该句型通过对比过去和现在的行为,突出变化;

时间状语从句中需使用过去时态(如"used to"、"had done"等);

可替换"do"为其他动词(如"learn"、"clean"等)以丰富表达。