F. Dispositional verbs or verbs showing a state of being, such as juéde 觉得 think/feel, xǐhuan 喜欢 like, ài 爱 love, shì 是 to be, zhīdào 知道 know, etc., do not take verb-suffix le 了.

Note: (x) means that -le 了 may not be used there.

  1. Zhāng tàitai jiéhūn yǐqián xìng (x) Wang.
    张太太结婚以前姓王。
    Mrs. Zhang 's family name was Wang before she got married.


  2. Zuótiān tā juéde (x) bú tài shūfu.
    昨天他觉得不太舒服。
    Yesterday he didn't feel so well.


  3. Yǐqián wǒ zhǐ zhīdào(x) tā huì zuò Zhōngguó fàn, bù zhīdào (x) tā yě huì zuò Yìdàlì fàn.
    以前我只知道他会做中国饭，不知道他也会做意大利饭。
    Before I only knew he knew how to cook Chinese food, I didn't know he also knew how to cook Italian food.


  4. Yǐqián xué Zhōngwén de xuésheng hěn shǎo (x).
    以前学中文的学生很少。
    Before there were few students who studied Chinese.


  5. Wǒ zài dàxué dè shíhou, tā shì(x) wǒ-de nǚpéngyou. Wǒ dāngshí fēicháng ài (x) tā.
    我在大学的时候，她是我的女朋友。我当时非常爱她。
    When I was in college, she was my girlfriend. I loved her very much at that time.