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 {#blank#}1{#/blank#}(肯定是)mine. It has my name on it.

The CD{#blank#}2{#/blank#}(可能是)Tony because he likes listening to pop music.

The hair band{#blank#}3{#/blank#}(不可能是)Bob's. After all, he is boy!

  She may{#blank#}1{#/blank#} {#blank#}2{#/blank#}a cut like that．

The story happened at the{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} {#blank#}5{#/blank#}.

Qomolangma is {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} mountain in the world.

If you {#blank#}1{#/blank#} {#blank#}2{#/blank#} the truth, you'll have nothing to fear.

The two students {#blank#}1{#/blank#} the same picture {#blank#}2{#/blank#}.