it is since为什么不用完成时
it is ...since ..为什么不用完成时
it is since为什么不用完成时
It is over a year since I last wrote to him.为什么前面不用完成时?It ha
为什么It is two months since she left Beijing用is不用has been
it is four years since I joined the army.这里的is,为什么不用was呢?
It is 3 years since he joined the army.为什么用is不用has been
it is/has been+时间段+since since后面接完成时还是一般过去?
It __four years since i joined the army.这里的is,为什么不用was呢?
为什么不用since
The Greens have lived here since 2000为什么要用现在完成时而不用现在完成进行时
It has been years since I returned home,为什么since用,而不用when?分不
how long did it last 为什么不用完成时 变成how long has it lasted