until 一定要与not连用吗?

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until 一定要与not连用吗?

until 一定要与not连用吗?
until 一定要与not连用吗?

until 一定要与not连用吗?
until:直到...才...
它前面是否定句,那到until后所指的时间就开始怎么了.
he didn't work until the boss saw him.直到老板看到他时,他才做事.
它前面是肯定句时,那到后所指的时间就停止了.
I worked on and on until it turned dark.我做事一直做天黑为止.

当然不一定啦,哪有那么多一定!!!

不一定

不用,可以说
I worked on and on until it turned dark