重点讲解

page 239


ask

sell sold sold

I asked the price of the car, but they had already sold it.

run, ran, run

leave, left, left

platform 站台

The day before yesterday, I ran to the platform quickly, but the train had already left.

go, went, gone

finish, finished

She had finished the housework before she went out.

go on holiday 度假

take the exam 考试

go, went, gone

take, took, taken

She went on the holiday after she had taken the exam.