学习效率的高低,是一个学生综合学习能力的体现。在学生时代,学习效率的高低主要对学习成绩产生影响。下面是小编为大家精心整理的人教版初三英语知识点，希望对大家有所帮助。
介词by的用法
1. 意为“在……旁”，“靠近”。
Some are singing and dancing under a big tree. Some are drawing by the lake.
有的在大树下唱歌跳舞。有的在湖边画画儿。
2. 意为“不迟于”，“到……时为止”。
Your son will be all right by supper time.
你的儿子在晚饭前会好的。
How many English songs had you learned by the end of last term?
到上个学期末你们已经学了多少首英语歌曲?
3. 表示方法、手段,可译作“靠”、“用”、“凭借”、“通过”、“乘坐”等。
The monkey was hanging from the tree by his tail and laughing.
猴子用尾巴吊在树上哈哈大笑。
The boy’s father was so thankful that he taught Edison how to send messages by railway telegraph.
孩子的父亲是那么的感激,于是他教爱迪生怎样通过铁路电报来传达信息。
4. 表示“逐个”，“逐批”的意思。
One by one they went past the table in the dark.
他们一个一个得在黑暗中经过这张桌子。
5. 表示“根据”，“按照”的意思。
What time is it by your watch?
你的表几点了?
6. 和take , hold等动词连用，说明接触身体的某一部分。
I took him by the hand.
我拉住了他的手。
7. 用于被动句中，表示行为主体,常译作“被”、“由”等。
English is spoken by many people.
英语被许多人说。(即“许多人讲英语。”)
常用连接词
1.表文章结构顺序：First of all, Firstly/First, Secondly/Second…And then, Finally, In the end, At last
2.表并列补充关系的：What is more, besides
3.表转折对比关系的：However, butAlthough + clause(从句) On the one hand… On the other hand… Some… while others…
4.表因果关系的：Because, As ，So, Thus, Therefore, As a result
5.表换一种方式表达：In other words
6.表进行举例说明：For example，句子;For instance，句子;
7.表陈述事实：In fact
8.表达自己观点: In my opinion
9.表总结：In a word In summary
10.文中正确使用两三个好的句型，如：宾语从句、状语从句、动名词做主语等。
(1)宾语从句举例：I believe Tianjin will be more beautiful and prosperous.
(2)状语从句举例：If everyone does something for the environment, our hometown will become clean and beautiful
(3)动名词做主语举例：Reading books in the sun is bad for our eyes.
It's bad for our eyes to read books in the sun.
重点句型
1.It is said that + 句子 据说…It is reported that + 句子 据报道…
2.There is no need to do 没必要做…
3.It's adj. for sb. to do 做…对某人来说…
4.so/such… that … 如此… 以至于…too … to do 太… 而不能…
5.not…until… 直到…才… 例： I didn't go to bed until my mother came back.
6.The reason why + 句子 is that + 句子 … 的原因是…
7.The reason why he got angry was that she told him a lie. (他生气的原因是她对他说了谎)
8.That is why + 句子 那是…的原因
9.That is because + 句子 那是因为…
10.as we all know, +句子 据我们所知
11.it is generally / publicly known / considered that…, 众所周知
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