内容正文:
Unit 8
Let's
Communicate!
零条件句+第一条件句
八年级英语上册
UNIT 8 · LET'S COMMUNICATE!
01
核心规则图谱
零条件句
If + 一般现在时,主句一般现在时
普遍事实 · 习惯 · 常见结果
第一条件句
If + 一般现在时,主句 will + 动词原形
将来可能发生的条件与结果
其他结果形式
情态动词 + 动词原形 / 祈使句
先看交际意图,不把所有主句都写成 will。
UNIT 8 · LET'S COMMUNICATE!
02
零条件句:通常会这样
If + 一般现在时,主句一般现在时
If you speak too fast,
people sometimes miss your meaning.
说话太快时,别人有时会听不明白。
表达事实、规律、习惯或常见结果。
关注“通常如此”,而不是预测将来的某一次结果。
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03
第一条件句:将来有可能
If + 一般现在时,主句 will + 动词原形
If we talk face to face,
we will understand each other better.
预测这次面对面交流可能带来的结果。
条件未必发生,结果也不是已经发生。
在这类未来条件句中,if 从句通常不用 will。
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04
同一个条件,不同的意思
习惯性做法 · 零条件句
If I feel upset, I talk to my parents.
一感到难过,我通常就和父母谈谈。
将来的一次可能 · 第一条件句
If I feel upset tonight, I'll call my sister.
今晚如果难过,我就给姐姐打电话。
先辨“通常如此”还是“将来可能”,再选主句形式。
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05
结果句也可以用情态动词
If + 现在时,主句 can / may + 动词原形
If he has difficulty hearing,
you can write it down.
在这个条件下,可以采用“写下来”的方式。
can write,不是 will can / can to write。
根据能力、许可或可能性等含义,选合适的情态动词。
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06
提出建议:用祈使句
If you can't reach her by phone,
try texting.
If you don't agree with others,
don't argue with them.
肯定:动词原形… 否定:Don't + 动词原形…
这里是在建议“怎么做”,不是预测“将会怎样”。
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07
位置改变,标点也要调整
if 从句在前:通常用逗号隔开
If you stay calm, it will help.
if 从句在后:通常不用逗号
It will help if you stay calm.
时态关系不变;句首大写和逗号随位置调整。
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08
一般现在时,也要写准确
注意第三人称单数
If everyone is ready, we'll start the video call.
everyone → is;she feels / someone has
否定:don't / doesn't + 动词原形
If you don't understand the message, ask again.
不要把从句写成 will not understand。
先确定主语,再检查动词形式。
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09
不只看 tomorrow:先看语境
1
这是常见结果,还是将来的可能?
通常如此 → 零条件句;未来可能 → 第一条件句。
2
结果是在预测,还是在提建议?
按含义选择 will、情态动词或祈使句。
3
检查从句、动词和标点。
现在时、第三人称单数、否定形式、逗号。
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10
回到教材:if 条件句
Grammar Focus
常见结果
If you want to solve the problem,
a face-to-face talk usually works the best.
未来可能
If the rehearsal ends at 7:00 p.m.,
I'll pick you up at 7:15 p.m.
提出建议
If you can't reach her by phone, try texting.
同样是 if 条件句,主句形式随表达目的而变化。
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11
基础过关
单项选择
(
)
1. If you listen carefully, you ________ people
better in most conversations.
A. understand
B. will understood
C. understood
D. are understanding
A
考点:零条件句表达一般规律。
解析:in most conversations 指常见情况,
主句用一般现在时 understand。
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基础过关
单项选择
约定下次会议结束后的见面安排。
(
)
2. If the meeting ends at seven, I ________ you
at the gate.
A. meet
B. met
C. will meet
D. meeting
C
考点:第一条件句表达未来可能的结果。
解析:按未来见面的语境,主句用 will meet;
if 从句用一般现在时 ends。
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13
基础过关
单项选择
(
)
3. If you ________ angry, take a moment
before you reply.
A. feel
B. will feel
C. felt
D. feels
A
考点:if 从句用现在时,主句可用祈使句。
解析:主语是 you,用 feel;take a moment
提出“回复前先停一停”的建议。
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14
基础过关
单项选择
(
)
4. If we talk face to face tomorrow, we ________
the problem faster.
A. solve
B. will solve
C. solved
D. are solve
B
考点:第一条件句的主将从现。
解析:谈论明天交流可能带来的结果,
主句用 will solve,从句用 talk。
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15
基础过关
单项选择
(
)
5. Which is correct?
A. If it will rain, we will stay home.
B. If it rains, we will stay home.
C. If it rains, we stayed home.
D. If it raining, we will stay home.
B
考点:未来条件从句用一般现在时。
解析:if it rains 与主句 will stay 正确搭配。
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基础过关
单项选择
(
)
6. Texting can cause misunderstandings
if you ________ careless with your words.
A. are
B. will be
C. were
D. be
A
考点:主句可含 can;if 从句用现在时。
解析:描述措辞不慎时可能出现的常见结果;
从句主语是 you,be 动词用 are。
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基础过关
单项选择
(
)
7. If you can't reach me by phone, ________
me a message.
A. sent
B. send
C. will sending
D. sends
B
考点:祈使句用动词原形开头。
解析:联系不上时,请“发消息”,用 send。
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18
基础过关
单项选择
(
)
8. If everyone ________ calm, the discussion
usually goes better.
A. stays
B. will stay
C. stay
D. stayed
A
考点:零条件句中第三人称单数的运用。
解析:usually 提示常见结果;everyone 按单数
处理,从句谓语用 stays。
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基础过关
单项选择
预测参加即将举行的这次交流会的结果。
(
)
9. If I go to the exchange meeting, I ________
new friends.
A. make
B. will make
C. made
D. am make
B
考点:根据未来语境选择结果句。
解析:本句不是习惯性叙述;预测这次参会
可能交到新朋友,用 will make。
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20
基础过关
单项选择
(
)
10. Which sentence describes a habit rather
than a future possibility?
A. If I see her tomorrow, I'll tell her.
B. If I feel stressed, I usually talk to my mum.
C. If the bus is late, we'll take a taxi.
D. If he comes tonight, we'll discuss it.
B
考点:区分习惯性结果与未来可能。
解析:B 中 usually talk 表示经常采取的做法。
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基础过关
单项选择
(
)
11. If your friend has difficulty hearing, you
________ write the key words down.
A. can
B. will can
C. can to
D. are can
A
考点:主句可用 can + 动词原形。
解析:can write 表示可以采用的沟通方式;
can 前不加 will / are,后不加 to。
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基础过关
单项选择
按常规书面标点,选择最合适的一项。
(
)
12. Which punctuation is correct?
A. If you have time call me.
B. If you have time, call me.
C. Call me, if you have time.
D. If, you have time call me.
B
考点:if 从句前置,后面通常用逗号。
解析:B 符合本题常规写法;后置从句通常不加逗号。
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语法填空
13. If people
(speak) clearly,
conversations are easier.
第14题:表达这次课后可能的见面安排。
14. If the class finishes early, we
(meet)
in the library.
speak
考点:零条件句的从句用一般现在时。
解析:people 是复数,谓语用 speak。
will meet
考点:未来可能结果用 will + 动词原形。
解析:按这次课后的安排,填 will meet。
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24
语法填空
15. If you
(not understand) the message,
ask again.
16. If she feels nervous, she usually
(take)
a deep breath.
don't understand
考点:if 从句的一般现在时否定形式。
解析:you + don't + 动词原形 understand。
takes
考点:零条件句中的习惯性结果。
解析:usually 表示习惯;主语 she,用 takes。
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25
语法填空
17. If I
(see) Tom tomorrow, I'll tell him the news.
18. You can text me if you
(need) help.
see
考点:第一条件句的主将从现。
解析:即使有 tomorrow,if 从句仍填 see。
need
考点:主句含 can,从句用一般现在时。
解析:从句后置不改变时态;you + need。
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语法填空
19. If everyone
(be) ready, we'll start the video call.
20. If the weather
(be) fine this weekend,
we will meet outdoors.
is
考点:everyone 作主语,be 动词用单数。
解析:if 从句用现在时,everyone + is。
is
考点:未来条件从句仍用一般现在时。
解析:weather 不可数,用 is,不用 will be。
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句型转换
21. 用 if 改写句子。
Talk calmly, and people will listen to you
more carefully.
If you talk calmly, people will listen
to you more carefully.
考点:把祈使句表达的条件改为 if 从句。
解析:补出主语 you;if 从句用 talk,主句保留 will listen。
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句型转换
22. 将 if 从句后置。
If you stay calm, it will help.
It will help if you stay calm.
考点:if 从句放在主句后,通常不用逗号。
解析:原句时态不变;It 大写,if 小写,去掉逗号。
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句型转换
23. 用 if 表示习惯条件。
I usually call my parents when I feel worried.
If I feel worried, I usually call my parents.
考点:习惯性条件与结果用零条件句。
解析:保留 usually;从句 feel 和主句 call 都用现在时。
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30
句型转换
24. 将 if 从句前置。
We will understand each other better
if we meet face to face.
If we meet face to face,
we will understand each other better.
考点:if 从句前置后,通常用逗号隔开。
解析:If 大写;从句末加逗号,主句 we 改为小写。
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句型转换
25. 用 if 合并两个句子。
You can write the information down.
The old man has difficulty hearing.
If the old man has difficulty hearing,
you can write the information down.
考点:条件从句 + can 表达可以采取的做法。
解析:听力有困难是条件;写下信息是可采用的沟通方式。
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易错突破
1. 判断句子是否正确;如有错误,请改正。
If it
will rain
tomorrow, we will cancel
the outdoor meeting.
rains
If it rains tomorrow, we will cancel the outdoor meeting.
考点:第一条件句的 if 从句用一般现在时。
解析:will rain 改为 rains;主句保留 will cancel。
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易错突破
2. 按常规书面标点补全句子。
If you are tired
you can take a break.
,
If you are tired, you can take a break.
考点:前置的 if 从句后通常加逗号。
解析:在 tired 后加逗号,分清条件从句与主句。
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易错突破
3. 判断句子是否正确;如有错误,请改正。
If she
feel
upset, she usually talks to her friend.
feels
If she feels upset, she usually talks to her friend.
考点:零条件句中动词的第三人称单数形式。
解析:从句主语 she 为第三人称单数,feel 改为 feels。
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易错突破
4. 判断句子是否正确;如有错误,请改正。
If I
will see
him, I'll give him your message.
see
If I see him, I'll give him your message.
考点:未来条件从句通常不用 will。
解析:从句 will see 改为 see,主句 I'll give 保持不变。
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易错突破
5. 表达即时建议:把主句改成祈使句。
If you don't understand,
you will ask
me now.
ask
If you don't understand, ask me now.
考点:按交际意图选祈使句,不机械使用 will。
解析:这里要提出即时建议,用 ask。
原句可有预测或指令含义,不能一概判为语法错误。
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37
Solving a Misunderstanding
综合应用 · 语篇 1 · 整体阅读
If my friend 1 ________ (look) upset, I usually
ask what happened. If the problem is only a small
misunderstanding, we 2 ________ (talk) about it
calmly. But if we can't solve it today, I
3 ________ (call) her tomorrow. If she
4 ________ (need) more time, I'll wait. If you
have a similar problem, 5 ________ (try) listening
before you explain yourself.
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38
Solving a Misunderstanding
综合应用 · 语篇 1
If my friend
1
(look) upset, I usually
ask what happened.
looks
1 考点:习惯性条件用一般现在时。
解析:usually ask 表明平时的做法;my friend 为单数,
从句谓语用 looks。
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39
Solving a Misunderstanding
综合应用 · 语篇 1
If the problem is only a small misunderstanding,
we
2
(talk) about it calmly.
But if we can't solve it today, I
3
(call) her tomorrow.
talk
2 考点:零条件句的习惯性结果。
解析:承接前一句的平时做法,按习惯性语境填 talk。
will call
3 考点:第一条件句的未来结果。
解析:今天解决不了,就明天联系;主句用 will call。
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40
Solving a Misunderstanding
综合应用 · 语篇 1
If she
4
(need) more time, I'll wait.
If you have a similar problem,
5
(try) listening before you explain yourself.
needs
4 考点:第一条件句的从句用现在时。
解析:主语 she 为第三人称单数,填 needs。
try
5 考点:用祈使句提出建议。
解析:建议“先尝试倾听”,主句以动词原形 try 开头。
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Planning a Video Call
综合应用 · 语篇 2 · 整体阅读
We are planning a video call for Saturday. If everyone
1 ________ (be) free at 8:00, we 2 ________
(start) then. If the internet connection
3 ________ (be) poor, we can turn off our cameras.
If someone 4 ________ (have) trouble joining,
send the meeting link again. I think the call will
go well if we 5 ________ (prepare) early.
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42
Planning a Video Call
综合应用 · 语篇 2
We are planning a video call for Saturday.
If everyone
1
(be) free at 8:00,
we
2
(start) then.
is
1 考点:从句现在时与不定代词 everyone。
解析:everyone 作主语,be 用第三人称单数 is。
will start
2 考点:第一条件句的未来结果。
解析:约定周六的行动,主句用 will start。
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Planning a Video Call
综合应用 · 语篇 2
If the internet connection
3
(be) poor,
we can turn off our cameras.
If someone
4
(have) trouble joining,
send the meeting link again.
is
3 考点:从句用现在时,主句用 can 提出办法。
解析:connection 为单数,填 is,而不是 will be。
has
4 考点:从句用现在时,主句用祈使句。
解析:someone 作主语时,have 变为 has。
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Planning a Video Call
综合应用 · 语篇 2
I think the call will go well if we
5
(prepare) early.
prepare
5 考点:if 从句后置,时态规则不变。
解析:主句 will go well 表示未来结果;
if 从句用一般现在时,主语 we 后填 prepare。
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自我诊断 · 回看与巩固
40 个作答点
先看意义,再选主句形式。
通常如此 → 现在时
未来可能 → will
建议做法 → 情态 / 祈使
36—40
稳定掌握
30—35
回看易错点后二刷
<30
先重学规则图谱,再做基础过关
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