Question

I'll never firget the days( ) I spent in the country.

Answer 1

用that

when 引导的是时间状语从句,而本句是定语从句.

将定语从句单独抽出来,完整的句子应该是：I spent （the days) in the country.

这里的that指代the days,是定语从句中的宾语.

如果用when,从句中应该不缺少任何成份,用when加了个时间状语而已.而本题中的从句中少了一个宾语,所以,应该用that.

如果将spent改成was,就用when做连词了.

I'll never forget the days(when ) I was in the country.此时,从句 I was in the country已经完整,用when增加一个时间状语.