sure的用法,be sure的用法总结？ _知识经验

【sure的用法,be sure的用法总结？】1．Be sure不定式用于祈使句sure的用法，作“务必、一定”讲。

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Be sure to come to my house.

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Be sure to finish your homework as soon as possible.
2. be sure 从句，表“确信、对…….有把握”
I am sure he is coming. = He is sure to come.
3. make sure从句 = make sure of 弄清、查清楚
Make sure that he has handed his workbook.
Make sure of it before you start out.