主語+was/were+現(xiàn)在分詞…

肯定句

Millie was drawing a picture when Mr Green

come in.

當(dāng)格林先生進(jìn)來時，米莉正在畫畫。

When Jim's mom came in, he was doing his

homework.

吉姆的媽媽進(jìn)來時，他正在做作業(yè)。

Sorry. I was swimming with my friends at

that time .

對不起，我那時正在和朋友一起游泳。

I saw him in the library yesterday. He was

reading a book at that moment.

昨天我在圖書館看見他了。那時他正在讀一本書

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