有助於看詞組,寫句子：Why not do sth?回答者給出準確的答案

題目：

有助於看詞組,寫句子：Why not do sth?回答者給出準確的答案

解答：

why not do ...是表示建議,「爲什麼不……?」之意.
...Why not have a rest?You have already worked for four hours.