2．“By the time”和“when”引导的时间状语从句

1．Past perfect Tense 过去完成时

3．Strengthen the consciousness of doing things regularly．做事加强连续性，有条不紊。

2．Learn to express something with Past Perfect Tense. 学习使用过去完成时态。

1．Learn to narrate past events．学会描述过去所发生的事情。

5.Are you able to take part in the entertainment on computer at home in the future?

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4.In the future, what will you use to open the door?

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3.If you are out of the house, who will call the fireman?

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4.__________________________? (Who)