have有很多意思，在Module 2 中，它主要表示拥有。
have v.(动词) 基本的涵义是“有”，强调“所属关系”，表示“拥有”。
如：I have a computer.
当主语为第三人称单数时，have不是在词尾直接加s (haves )，而是换成has。
如：Danny has a brother.
注意：
（1）have和has在否定句、疑问句中，要借助助动词do, does构成疑问句，借助don't, doesn't构成否定句。并把has还原成have。
如： Lily has some red pencils.
(否定句)Lily doesn't have any red pencils.
(疑问句)Does Lily have any red pencils?
（2）have的否定句、疑问句也可以不借助于助动词，而直接在have和has后加not构成否定句或将have和has提到句首构成疑问句。
不过这种变法只有have和has作“有”讲时才能用，千万别变错呀！
如：
I have an eraser.
(否定句)I haven't an eraser. (疑问句)Do you have an eraser?
We have lunch at school.
误：We have not lunch at school. 正：We don't have lunch at school.
练一练：选出正确答案
1、Do you___ a computer? No, I ___
A. has, don't
B. have, don't
C. have, have
2、We have lunch at school.变为否定句。
A. We don't have lunch at school.
B. We have not lunch at school.
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