2019-2020学年译林版高中英语必修2专项精品课件:时间状语从句课件(共16张PPT)
2019-2020学年译林版高中英语必修2专项精品课件:时间状语从句课件(共16张PPT)第3页

 一、 when/while 的区别 1.when表示主从句两个动作同时发生或先后发生。而while表示主从句两个动作同时发生或强调主句的动作在从句动作进行期间发生。 (1)______ they are waiting for the New Year, they listen to music , sing songs and dance. (2)______ the boy saw his mother, he stopped crying.

While

When