经典句型Work hard, and you will make great progress. (努力学习，你就会取得很大的进步。) He studied hard and got good grades. (他努力学习并且取得了好成绩。)
both... and... (两者都)
连接两个主语时，谓语动词用复数。
Both she and I are good at math. (她和我都擅长数学。) -Both Tom and Jerry like ice cream. (汤姆和杰瑞都喜欢冰淇淋。)
not only... but also... (不但……而且……)
强调后者；连接主语时，谓语遵循就近原则。
Not only you but also he likes the movie. (不仅你，而且他也喜欢这部电影。) He is not only smart but also hardworking. (他不但聪明而且勤奋。)
转折/对比
but (但是)
表示意义转折或前后事实相反。
注意：与“though/although”不能同时出现在一个句子中。I want to play soccer, but it's raining. (我想踢足球，但下雨了。) She tried hard but still failed. (她努力尝试了但是仍然失败了。)
while (而，然而)
强调对比性转折，用于比较两个人或事物的不同。
I like English while he likes math. (我喜欢英语而他喜欢数学。) I like summer while my sister likes spring. (我喜欢夏天，而我妹妹喜欢春天。)
选择/条件
or (或者；否则)
①表示选择；②用于“祈使句+or+简单句”结构，意为“否则”。
经典句型：Hurry up, or you will be late for school. (快点儿，否则你上学会迟到的。) Do you want tea or coffee? (你想要茶还是咖啡？)
either... or... (要么…要么…)
表示两者择其一；连接主语时，谓语遵循就近原则。
Either you or I am going to finish the task. (要么你，要么我将去完成这项任务。) You can either stay here or leave. (你要么留在这里要么离开。)
因果
so (所以，因此)
表示结果。注意：与“because”不能同时出现在一个句子中。
It was raining, so I took an umbrella. (天在下雨，所以我带了一把伞。)-He worked hard, so he passed the exam. (他努力学习，所以通过了考试。)
for (因为)
表示原因，提供补充说明。语气较弱，不能置于句首。
The ground is wet, for it rained last night. (地面是湿的，因为昨晚下雨了。) I bought a cake, for it's her birthday. (我买了蛋糕，因为今天是她的生日。)
二、从属连词
从属连词用来引导状语从句和宾语从句，使一个句子成为另一个句子的附属成分。
类别
常用连词
核心用法
中考例句
时间状语
when (当……时)
从句动作可发生在主句动作之前、之后或同时。
I was reading when he came in. (当他进来的时候我正在读书。) When the clock struck ten, all the lights went out. (当时钟敲响十点时，所有的灯都熄灭了。)
while (当……时)
强调主从句动作同时进行，从句动词常用进行时。
While I was cooking, he was watching TV. (在我做饭的时候，他在看电视。) While I was walking along the street, I met an old friend. (我正沿着街走时，遇到了一个老朋友。)
as soon as (一……就……)
强调两个动作几乎紧接着发生。主将从现。
I'll call you as soon as I arrive in Beijing. (我一到北京就给你打电话。) Tom will call me as soon as he gets to Shanghai. (汤姆一到上海就会给我打电话。)
not... until... (直到……才……)
主句动词通常为短暂性动词，用否定式。
I didn't finish my homework until twelve o'clock last night. (我直到昨晚十二点才完成作业。) I waited until he came back. (我一直等到他回来。)
since (自从)
从句用一般过去时，主句用现在完成时。
I have studied English since I was twelve. (我从十二岁起就一直学英语。)He has owned the toy bear since he was four. (他自从四岁起就拥有这只玩具熊了。)
条件状语
if (如果)
表示假设。主将从现。
If it rains tomorrow, we will stay at home. (如果明天下雨，我们将呆在家里。) -If you study hard, you will get good grades. (如果你努力学习，就会取得好成绩。)
unless (除非)
相当于“if not”。
You won't pass the exam unless you study hard. (除非你努力学习，否则你不会通过考试。) You'll be kept out of the party unless you have an invitation. (除非有请柬，否则您无法参加这个聚会。)
as long as (只要)
引导条件状语从句，主将从现。
As long as we pull together, we will succeed. (只要我们齐心协力，我们就会成功。)
原因状语
because (因为)
语气最强，回答“why”的提问。
He was late because he missed the bus. (他迟到是因为他错过了公共汽车。) I stayed home because I was sick. (我待在家是因为生病了。)
结果状语
so... that... (如此……以至于……)
so后接形容词或副词。
He is so tired that he can't walk. (他如此疲倦以至于不能走路。) -The problem is so difficult that none of us can solve it. (这个问题太难了，以至于我们没有一个人能解决它。)
such... that... (如此……以至于……)
such后接名词短语。
He was such a brave man that everyone admires him. (他是如此勇敢的一个人，以至于人人崇拜他。)-
让步状语
though / although (虽然，尽管)
与“but”不能同时出现在一个句子中。
Although it was raining hard, he still went out. (虽然雨下得很大，他仍然出去了。) Though he is poor, he is ready to help others. (尽管他穷，但他乐于助人。)
目的状语
so that (以便，为了)
从句中常包含情态动词(can, could等)。
He got up early so that he could catch the first bus. (他早起以便能赶上第一班车。) Give me your email address so that I can send you the document. (给我你的邮箱地址，以便我把文件发给你。)
宾语从句
that
无实际意义，不作成分，常可省略。
He told me (that) he wouldn't be late. (他告诉我说他不会迟到的。) I'm glad that you're ready to help others. (我很高兴你乐于帮助别人。)
if / whether (是否)
引导宾语从句时，表示不确定或疑问。
I want to know if she is going to see a film. (我想知道她是否要去看电影。) -I don't know whether it will rain or not today. (我不知道今天会不会下雨。) -
💎 三大黄金法则 & 易错点提醒
“因为/所以”不共存，“虽然/但是”不连用：because 和 so 在英语中不能同时出现在一个句子里；though/although 和 but 也不能同时出现，二者只用其一-。
❌ 错：Because he is ill, so he can't come.
✅ 对：Because he is ill, he can't come. / He is ill, so he can't come.
“就近原则”三兄弟：either...or..., neither...nor..., not only...but also... 连接两个主语时，谓语动词的形式由最靠近它的那个主语决定。
Either you or he is right. (要么你对，要么他对。)
Not only you but also he likes the movie. (不仅你，他也喜欢这部电影。)
、点亮下方
并转发！
