I cannot for the life of me imagine why they want to leave.

　　我怎么也想象不出他們為什么要走。

　　Can you imagine what it must be like to lose your job after 20 years?

　　你能想象得出干了20年之后被辭退會是什么樣的滋味嗎？

　　I would imagine the job will take about two days.

　　我猜想這工作大概需要兩天左右的時間吧。

　　I can't imagine life without the children now.

　　我現在無法設想沒有了孩子們的生活。

　　I should imagine it will take about three hours.

　　我想得用差不多三個小時吧。