they promise that the work would all be finished -----next week a until b in c by d toin next week \by next week 的区别理解成by next week 是一段时间in next week 是一个点吗

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theypromisethattheworkwouldallbefinished-----nextweekauntilbincbydtoinnextweek\bynextweek的区别理解成bynex

they promise that the work would all be finished -----next week a until b in c by d toin next week \by next week 的区别理解成by next week 是一段时间in next week 是一个点吗
they promise that the work would all be finished -----next week a until b in c by d to
in next week \by next week 的区别理解成by next week 是一段时间in next week 是一个点吗

they promise that the work would all be finished -----next week a until b in c by d toin next week \by next week 的区别理解成by next week 是一段时间in next week 是一个点吗
可以这么理解.by是指从那个点之前的一段时间.

by