for the first time,the first time有什么区别

1从短语用法，意义解释，并举例子。
“I am fond of it first time I saw it.”对不？若不对如何改？

不对，正确的说法为 I am fond of it the first i saw it. 这句话是想说，自打我第一次看见它就为止着迷了。楼上的已经分析的很好了。不用赘述了。具体使用上，for the first time,可以作为一个独立的状语从句，放在句子里面，比如，For the first time, i realized the importance of english. 然后它还可以作为一个插入语使用，比如，at that special night, i realized for the first time the importance of english.
至于 the first time,具体使用上，它不能独立存在，而只能与其他具体指代的对象同时出现。比如，i realized the importance of english the first time it flashed into my eyes.

at the first time 指在第一次 如一个人打算分3次做一件事情，at the first time, he made a ..., but failed. at the second time, ..., failed again. for the first time 指为了第一次,第一次。 如，on her boyfriend's birthday, she cooked for him for the first time.她男朋友生日那天，她第一次为他做饭。 on the first day，指第一天 如一个人打算用3天去做一件事情，on the first day, he made a..., on the second day, he did sth...

i am fond of it from the first time i saw it.

首先，这里最好使用完成时 I've been fond of it since the first time I saw it(不过我一般会用I've loved it...) For the first time意思是首次，而the first time意思是特指那一次（第一次，同理the second time是第二次） 举例子When I was 6, I saw an elephant for the first time That was the first time I saw an elephant when I was 6.

for the first time 是一个表时间的介词短语在句子中做时间状语.如: I've been here for the first time.我是第一次来这. the first time 相当于一个从属连词,意思先进同于as soon as.如 I loved this picture the first time I saw it.我一看到这幅画就喜欢上它了. the first time 可用as soon as替换