the first time的句子什么时候用过去时,什么时候用完成时?

1.当the first time作连词用,引导一个时间状语从句时,从句一般用过去式,例如：
He fell in love with Mary the first time he saw her.(他对玛丽一见钟情.)
2.当the first time用在“It is/was the first time that……”结构中时,从句一般用完成式.如果前边用“is”,从句用现在完成式；如果前边用“was”,从句用过去完成式.例如：
It is the first time that I have heard the news.这是我第一次听说这个消息.
It was the first time that he had been to Beijing.这是他第一次去北京.

这个看你表达的句子是什么时态呀
the first time that i learned to sing a song is 1990.
我第一次学游泳是90年
the first time i saw her i shoule have tell her that i love her
这些都是看你要表达的意思而定的

It is/was the first time……是与完成时在一块用的。
It is the first time I have talked with native speakers in English
过去时：It's the first time I read the book.

主语句子是过去就用过去，主语是完成的就用完成，要看主句。