【拓展】need作情态动词时，后面+动词原形，意思是必要，必须。这时need多用于疑问句，否定句或条件状语从句中。如：

You needn't talk so loud. 你不必这么大声说话。

11. As long as 只要；既然。如：You don't need a lot of friends as long as they're good.

你不需要很多朋友，只要他们好就可以了。

12.It's not necessary to be the same.完全一样是没有必要的。

It's+adj.+ for sb.+ to do sth. It是形式主语，to do sth.是真正主语。意为"某人做某事怎么样"如：It is easy for me to make friends. 我交朋友很容易。

13.My friend is the same as me.我的朋友和我一样。

be the same as... "和......一样"。反义词组：be different from..." 与.......不同的" 如：

My bike is different from yours.= My bike is not the same as yours. 我的系行车和你的不一样。

14. serious 意为"严肃的；认真的；严重的"

be serious about sth. 如：

He was serious about the matter. 他对那件事很认真。

be serious with sb. 如：

There's nothing much serious with you. 对你来说没那么严重。

15. touch one's heart 感动某人

16. be talented in music 有音乐天赋

17. However 意为"然而；但是"，表示转折关系，与but意义相同，但but一般谓语句首，而however比较正式，可位于句首、句中或句末，且常用都好隔开。如：

You didn't finish your homework. You can, however, do it now. 你还没有完成家庭作业，但是现在你可以写了。

18. hard-working意为"努力的"其比较级为 more hard-working 意为"更努力"，less hard-working 意为"不努力"。

19. be similar to...意为"与......相似"。(注意与 be the same as 区别)如：

My pen is similar to yours. 我的钢笔和你的相似。