精选优质文档-倾情为你奉上过去进行时中的when和while教学目标：学生通过观察不同语境中when和while的使用，归纳总 结过去进行时中when和while的用法，并能正确恰当得 在过去进行时态中使用。教学步骤：Step 1 Lend in Present two sentences from the textbook with when and while. Ask students if they can tell the differences between when and while in past progressive tense.Step 2 Presentation 1.Present sentences with when and fill in the blanks to conclude the usage of when. 2.Present sentences with
