1.情态动词must, may , might, could, may , can’t表示推测含义与用法后面都接动词原形，都可以表示对现在情况的揣测和推断但他们
含义有所不同
must 一定 肯定 (100%的可能性)
may, might, could有可能，也许 (20%－80%的可能性)
can’t 不可能，不会 (可能性几乎为零)
The dictionary must be mine. It has my name on it.
The CD might/could/may belong to Tony because
he likes listening to pop music.
The hair band can’t be Bob’s. After all, he is boy!
2. whose 谁的 疑问词 作定语 后面接名词
如：Whose book is this? This is Lily’s.
