1. 表示以前沒有某物的句型

　　There was no + 單數名詞或不可數名詞 + 過去時間。There was no library in my old school.

　　There were no + 復數名詞 + 過去時間。There were no computers or Internet in my time.

　　注意： no+ 名詞相當于not a / an / any + 名詞。 There weren’t any computer rooms at all. There was no gym ,either.

　　2. 表示不喜歡的句型

　　I didn’t like + 名詞或動名詞。如：

　　Before I didn’t like dogs. Before I didn’t like beef. Before I didn’t like going running.

　　3. 表示過去不能做或不會做的句型

　　I couldn’t + 動詞原形。 I couldn’t go cycling before. People couldn’t use the Internet in the Tang dynasty.

　　4. 如何描述某人過去和現在的不同情況

　　① 外貌和性格：Before, 主語+was / were +形容詞. Now，主語+am / is / are +形容詞.

　　Before I wasn’t tall. I was quiet. Now I am tall. I am active.

　　Before she had short hair. Now she has long hair.

　　Before he didn’t wear glasses. Now he wears glasses.

　　②能力方面：Before, 主語+couldn’t +動詞原形. Now, 主語+can +動詞原形.

　　Before I couldn’t swim. Now I can swim very well.

　　③愛好方面：Before, 主語+didn’t like +名詞 / 動詞ing. Now, 主語+like +名詞 /動詞ing.

　　Before he didn’t like reading books. Now he likes reading books.

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