打好初二年级上册的英语语法基础，对于初二年级下册英语语法的学习会有很大的帮助。下面是小编给大家整理的初二下册英语语法的相关知识，供大家参阅!
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(1)当主句为一般过去时时，从句常用过去的某种时态。 While I was doing my homework , the telephone rang.
(2)当主句的时态为一般将来时， 从句用一般现在时。 I will call you as soon as I get to Beijing.
本topic出现的句子有：
1.While you were enjoying your trip, I was busy prepa
ring for my exams.
2.He didn’t raise his head until someone called his name.
3.While the crowd was pushing him in different directions, someone stepped on his toes.
.4. As soon as the three boys saw each other, they all jumped up happily.
5.After they rode their bikes for two and a half hours, Kangkanf , Michael and Darren arrived at the Ming Tombs.
6.As they were exploring happily, the crowd became larger and larger.
Topic3 Bicycles are popular with people
1. While you were enjoying your trip, I was busy preparing for my exams.当你在旅行时， 我正忙于准备考试。
(1)be busy doing sth,/ be busy with sth 忙于做某事 I’m busy preparing for my birthday party these days.
(2)while 当……时候，引导时间状语从句。当一个动作在正在进行时，另一个动作也同时进行。While my mother was cooking , I was watching TV.
2.Would you help me plan a trip ? 请你帮我定个旅行计划好吗?
Would you 比will you 语气更加客气，委婉, 类似还有could you
Could you come along with us ?
3. They surveyed the area to make sure their tombs faced south and had mountains at the back. 他们仔细勘测了整个区域，确保这些陵墓是坐北朝南，而且在背后有群山环绕。
make sure 确信，确保 Make sure all the windows are closed before you leave.
4.It’s about two and a half hours by bike. 骑自行车大约要2个半小时。
Two and a half hours = two hours and a half
5.It’s to the east of Yongling. 它在永陵的东面。
to the +方位词+of (表示互不接壤) Japan is to the east of China.
on the +方位词+of (表示相互接壤)Fujian is on the south of Zhejang .
in the +方位词+of 表示在某一范围内的地区 Beijing is in the north of China.
6.They walked into Dingling and were surprised at the wonders. 他们走进定陵，对那里的奇观感到很惊奇。
be surprised at 对……感到很惊奇 He is surprised at dragons.
be surprised to do sth 惊奇地做某事 She was surprised to find she was lost.
7.…so they had to look for space to park their bikes 他们不得不寻找停自行车的地方
space 空间 Can you make space for this old man ?
8. While the crowd was pushing him in different directions, someone stepped on his toes.
当人群从四面八方挤来时，有人踩了他的脚。
in one’s direction 朝着某人的方向 step on one’s toes踩了某人的脚
step on sth 踩某物 Don’t step on the flowers and grass.
9.When he finally rushed out of the crowd, he noticed his friends were both out of sight.
当他最后冲出人群时，他注意到他的两个朋友都不见了。 notice sb do sth 注意某人做了某事 notice sb doing sth注意某人正在做某事
10. As soon as the three boys saw each other, they all jumped up happily.
三个男孩一见面，就高兴得跳了起来。
as soon as 引导时间状语从句 意为“一……就” He left as soon as he heard the news.
I’ll tell him as soon as I see him.
11.He didn’t raise his head until someone called his
name. 直到有人喊他的名字，他才抬起头。 not …until 直到……才
12.They were so lovely that we couldn’t help playing with them.
它们太可爱了，我们禁不住和它们一起玩。
can’t help doing sth 忍不住做某事 When I heard the funny news, I couldn’t help laughing.
13. I am satisfied with everything in China. 我对在中国的一切感到满意。]
be satisfied with 对……感到满意 He is satisfied with my work.
14.. We even asked the guard for help. 我们甚至向保安寻求帮助。
ask sb for help 向某人求助 The lost boy asked the police for help.
1。引导词：
(1) when, while , as 当……时候. when 后可跟短暂性动词也可跟延续性动词;while 后跟延续性动词;as 多用于口语，强调同一时间，或一前一后。
The students were talking in the classroom when the teacher came in.
= While the students were talking in the classroom , the teacher came in. 学生在教室里谈话时，老师进来了。 Mother always sings as she cooks dinner for us. 妈妈总是边给我们做饭边唱歌。
(2)not … until 直到……才，主句谓语动词常用短暂性动词。
I won’t leave here until the rain stops.
He didn’t sleep until his mother came back home.
(3) after 在……之后，before 在……之前，as soon as 一……就
I went to sleep after I finished my homework..= I finished my homework before I went to sleep.
As soon as the bell rings , the students will go into the classroom.
(一)词形转换：
1. death (动词) die (形容词 )dead 2 slow (副词) slowly
3.crossing(动词)cross 介词) across 4. success(动词)succeed (形容词successful
5.Pain (形容词) painful 6. lead (名词) leader
7.final (副词) finally 8impossible (反义词) possible 9 courage (动词) encourage
(二)重点词组:
1.Slow down 减速
2. run into 撞到
3. avoid doing sth 避免 防止做某事
4. warn sb to do sth 警告/提醒某人做某事
5. ride into 进入 跻身于
6 get used to (doing) 习惯于做某事
7. a sharp turn 急转弯
8. be popular with 受……的欢迎
9. get a fine 处以罚金
10. go on doing sth 继续做某事
11. the way to success 成功之路
12. obey the traffic rules 遵守交通规则
13.break the traffic rules 违反交通规则
14. be afraid of doing sth 害怕做某事
15.be famous for 因……闻名
16. be in danger 处于危险中
17.after a while 一会儿
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