■我确信你会成功。

误：I assure your success.

误：I assure that you will succeed.

正：I am assured of your success.

正：I am assured that you will succeed.

析：assure 的意思不是“确信”，而是“使确信”, 其常用结构是 assure sb of sth 或 assure sb that(使某人确信某事)，注意其被动语态的使用。另外，assure表示“保证”、“担保” 时, 其句型也是一样。如：I assure you of its quality.(它的质量我可以向你保证)，I assure you that he will come. (我向你保证他会来)。

■他向我保证他会帮助我。

误：He assured (me) to help me.

正：He assured me of his help.

正：He assured me that he would help me.

析：assure不能接跟不定式或不定式的复合结构作宾语，注意其常用结构 assure sb of sth。