Question

用unless造一个一般将来时和一个一般过去时的句子

Answer 1

unless是从属连词,引导条件状语从句,含有否定意义,相当于if条件状语从句的否定形式.所以unless = if not.注意：unless引导的条件状语从句和if条件状语从句,与其它时间状语从句一样,用一般现在时代替将来时
一般将来时
She will keep on singing unless she is told to stop. 她会一直唱下去，除非有人叫她停止

一般过去时
The wife told her husband that unless he left the children to die in the forest, the whole family would die.妻子告诉丈夫，如果他不把孩子们扔到森林里让他们自生自灭，全家人都会死