(1)本句是“祈使句＋and＋陈述句”句型。它表示“如果……就……”，其中祈使句相当于一个if引导的条件状语从句，and之后的句子相当于主句。
(2)“祈使句＋or(else)/otherwise＋陈述句”表示“……否则……” (3)在“祈使句＋并列连词＋陈述句”句型中，也可以用“名词＋并列连词＋陈述句”表示。
[金句推送] (2018·北京卷·满分作文) Please feel free to let me know if you have further questions，and I will answer you as soon as possible.
如果你还有其它问题，请随时告诉我，我也会尽快答复你。 [基础练习]——单句语法填空
①Give me a chance，and I'll give you a wonderful surprise. ②Seize the chance，or/otherwise you won't have one any more. [能力提升]——句式升级
(普通表达)If you close the door of fear behind you，you will see the door of faith open before you.
(高级表达)Close_the_door_of_fear_behind_you，and you will see the door of faith open before you.(祈使句＋and＋陈述句)
多维训练——夯实基础
维度1——用所给词的正确形式填空
1．It is_acknowledged (acknowledge) that the shortest distance between persons is a sincere smile.
2．Many young people decided to abandon buying(buy) houses in big cities because of high price.
3．It is required that the books in the library should be_classified(classify) by subject.
4．He won't come，so why bother inviting/to_invite(invite) him? 5．The plan was_abandoned (abandon) when it was discovered just how much the scheme would cost.
6．The classification (classify)of diseases is a bit complicated. 7．The general commanded that the soldiers (should)_leave (leave) their fort and carry out more important tasks.
8．So far，I have_corresponded (correspond) with a foreign friend for two years and we write to each other once a month.
维度2——在空白处填入一个适当的词
1．Her long illness caused her to drop behind the rest of the class. 2．The party was almost over，but Jane still hadn't turned up. 3．Living creatures are classified into plants，animals and protists. 4．This type of university course is no longer relevant to today's problem. 5．I'm at your command－what would you like me to do?
6．The written record of our conversation doesn't correspond with what was actually said.There are a lot of mistakes.
7．A few minutes earlier，and you could have seen the famous scientist. 维度3——查缺补漏
1．He displayed thorough competence (competent)in dealing with the issues. 2．Square the page off with your ruler，then you'll be able to copy the drawing accurately (accurate)．
3．The parents did not seem particularly well qualified (qualify) to cope with the crying child.
4．There're several effective ways to engage students in the evaluation (evaluate) of their own learning.
5．Wherever we are，we should keep in mind that we are Chinese. 维度4——话题写作
1．补全要点句(加黑体部分请利用本单元所学词汇) ①关于因特网对我们生活的影响一直有着激烈的争论。
About the Internet，there have been heated arguments over the effects on our lives.
②有些人认为因特网有积极的影响。
Some people think the Internet has_positive_effects. ③这是因为当人们需要信息时，因特网是许多人求助的首选。
That_is_because when people are in need of information，the Internet is the
first source that many people turn_to. ④只要轻敲按键或点击鼠标，我们就能找到大量的信息。 With the touch of a button or the click of a mouse，we can get abundant_information. ⑤然而它的一个大的缺点是难以判断信息是否真实或准确。
One great weakness of the Internet，though，is that it_is_difficult_to judge whether the information is true or accurate.
⑥我们应该牢记，只有充分利用它的优势，互联网才会对我们的生活有积极的影响。
We should keep_in_mind that the Internet will have a positive influence on our lives only if we make full use of its advantage.
2．升级平淡句
(1)利用reason作先行词改为定语从句升级1中的句③
That_is_the_reason_for_which/why_when_people_are_in_need_of_information，the_Internet_is_the_first_source_that_many_people_turn_to.
(2)把only if从句置于从句句首升级1中的句⑥
We_should__keep_in_mind__that_only_if_we_make_full_use_of_its_advantage_will_the_Internet_have__a_positive_influence_on_our_lives. 3．衔接成美文(注意利用适当的过渡衔接词汇：in conclusion)
About the Internet，there have been heated arguments over the effects on our lives.Some people think the Internet has positive effects.That is the reason for which when people are in need of information，the Internet is the first source that many people turn to.With the touch of a button or the click of a mouse，we can get abundant information.One great weakness of the Internet，though，is that it is difficult to judge whether the information is true or accurate.
In conclusion，we should keep in mind that only if we make full use of its advantage will the Internet have a positive influence on our lives.
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