※ 引述《snob2 (ggg)》之铭言：
: 请问,
: to + v
: 虽然看不出时态
: 但能不能表达句子的时态
: Destiny had brought the man to him
: to set him on his destined path.
: ^^^^^^
: 此句有过去完成式
: 应该要有过去式的句型
: 谢谢
不定词可以表示语态和时式(跟主要动词比早晚)：
时式 主动语态 被动语态
简单式 to+V to be+pp
进行式 to be+Ving 无
完成式 to have+pp to have been+pp
完成进行式 to have been+Ving 无
例子：
He pretended to be sleeping. (pretend与to be sleeping同时发生)
I am sorry to have kept you waiting so long. (to have kept比am sorry还早发生)
You seem to have been worrying all day.
(to have been worrying比seem还早发生，并持续到seem发生时或仍在继续)
PS.以上节录自吴炳钟“实用英语文法百科”