for the first time,first time,the first time和by the first time的具体用法和怎样区别?

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forthefirsttime,firsttime,thefirsttime和bythefirsttime的具体用法和怎样区别?forthefirsttime,firsttime,thefirstti

for the first time,first time,the first time和by the first time的具体用法和怎样区别?
for the first time,first time,the first time和by the first time的具体用法和怎样区别?

for the first time,first time,the first time和by the first time的具体用法和怎样区别?
for the first time 相当于一个状语,所以它可以随便放哪儿都行,first time,第一次,作为一个名词组,the first time ,可以作为先行词引导时间状语从句,也可和first time一样,by the first time,也是作为一个状语词组,到第一次为止