扩句根据表达的需要添加上定语、状语、补语等连带成份，使句子的或课文意思更具体形象，充实丰满。下面是小编收集整理的一些英语句子扩展的方法，大家一起来看看吧!
一、 添加基本修饰成分(adj, adv, 不定式短语，分词短语，介词短语，定语从句状语从句)
Mary was a beautiful girl./She smiled happily.
I bought a desk lamp that has many new functions.
Many students go to training classes so that they can learn more.
Many people learn English in order to…
Be sure to choose a good training class, otherwise…
二、 从简单句变为主从复合句
例:We need relaxing time most.=What we need is…/The teacher did’t give up me./There is so much homework, which is a burden for student.
三、 使用非谓语doing/done/to do实现高级扩展
The teacher praised me./Having known what happened,…
Having not the first prize, I gave my teacher a big hug.
To make our life easier and more convenient, I have designed a pair of shoes.
四、 句尾开放性(中文句首开放性)
He is reading.
He is reading a book.
He is reading a book written by Mark Twain.
He is reading a book written by Mark Twain in the reading-room.
He is reading a book written by Mark Twain in the reading-room on the second floor of our library.
He is reading a book written by Mark Twain in the reading-room on the second floor of our library which has just opened.
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2记牢背英语的句子方法
第一步，是要理解句子的意思。
你先不要嫌麻烦，将句子一个单词一个单词的翻译过来，刚开始还很麻烦，但翻译多了，你就会有一种灵感。时不时就会冒出一些单词，使你加深印象，最后记住它。
第二步，就是要会读。
连读都不会，你还背句子干什么。当你做完第一步时，千万不要停，它只是个起步。你将这个句子读五遍，一定要读顺、读透，达到别人说前半句，你能接出后半句的地步。只要你用心读，这个过程5分钟足矣。
第三部，动手写。
我们常听父母、老师或其他人说:“好记性不如烂笔头。”说的也是。读的再多，也不是为写作铺垫，让写的更加顺利。我的方法是写一边英语，但是要先看一遍要写的英语句子，然后写的过程中不去看句子，并且写的过程中不断念着这个句子，这样，手与脑结合，记住句子更快了。
第四部，才是记住的关键，前面都是为这一步打下厚厚的地基
你们肯定很好奇事先准备的小贴纸吧，好，小编告诉你。你将中文写在小贴纸上，不要太密了。然后贴在醒目的地方，看着它，认真的背。不懂就看书。连背三遍，就会了。
第五步，也是最后一步。
学习，是一个循环进给的过程，要想一步登天，那是不可能的，除非你有异能。早上6点起来，也不用花多久，就5分钟，对着小贴纸上背一背，不懂在翻书。我相信，句子一定记忆深刻吧!
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3写有用英语句子方法
1. 避免重复使用同一词语为了使表达更生动，更富表现力，同学们在写作时应尽量避免重复使用同一词语来表示同一意思，尤其是一些老生常谈的词语。如有的同学一看到“喜欢”二字，就会立刻想起like，事实上，英语中表示类似意思的词和短语很多，如 love, enjoy, prefer, appreciate, be fond of, care for等。如:I like reading while my brother likes watching television.→ I like reading while my brother enjoys watching television.我喜欢看书，而我的兄弟却喜欢看电视。
2. 适当使用短语代替单词。
(1) He has decided to be a teacher when he grows up.
→ He has made up his mind to be a teacher when he grows up.
他已决定长大了当老师。
(2) He doesn't like music.
→ He doesn't care much for music.
他不大喜欢音乐。
(3) He told me that the question was now under discussion.
→ He told me that the question was now being discussed.
他告诉我问题现正正在讨论中。
3. 合理使用省略句
合理恰当地使用省略句，不仅可以使文章精练、简洁，而且会使文章更具文采和可读性。如:
(1) He may be busy. If he’s busy, I’ll call later. If he is not busy, can I see him now?
→ He may be busy. If so, I’ll call later. If not, can I see him now?
他可能很忙，要是这样，我以后再来拜访。要是不忙，我现在可以见他吗?
(2) If the weather is fine, we’ll go. If it is not fine, we’ll not go.
→ If the weather is fine, we’ll go. If not, not.
如果天气好，我们就去;如果天气不好，我们就不去了。
(3) She could have applied for that job, but she didn’t do so.
→ She could have applied for that job, but she didn’t.
她本可申请这份工作的，但她没有。
4. 适当运用非谓语结构
非谓语结构通常被认为是一种高级结构，适当运用非谓语结构，会给人一种熟练驾驭语言的印象。如:
(1) When he heard the news, they all jumped for joy.
→ Hearing the news, they all jumped for joy.
听了这消息他们都高兴得跳了起来。
(2) As I didn’t know her address, I wasn’t able to get in touch with her.
→ Not knowing her address, I wasn’t able to get in touch with her.
由于不知道她的地址，我没法和她联系。
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4英语句子种类
陈述句:说明一个事实或陈述一种看法。
Light travels faster than sound.(光比声速度快)
The film isn't interesting.(这部电影很乏味)
疑问句:
(1)一般疑问句 Can you finish the work in time?(你能按时完成工作吗?)
(2)特殊疑问句 where do you live?(你住哪?)
(3)选择疑问句 Do you want tea or coffee?(你要茶还是要咖啡?)
(4)反意疑问句 He doesn't know her,does he?(他不认识她，对吗?)
祈使句:提出请求，建议或发出命令，祈使句的肯定句都是以动词原形开头，其否定句都是在动词原形前加don't。
Sit down ,please.(请坐)
Don't be nervous!(别紧张)
感叹句:表示说话人惊奇、喜悦、愤怒等情绪。感叹句构成有三种形式:
(1)What+a/an+单数可数名词+主语+谓语!
(2)What+复数名词/不可数名词+主语+谓语!
(3)How+adj/adv+主语+谓语!
