【正文】
__________________ 、我們、他們都來自中國。How many types of words are there in English ? 名 n. 介 prep. 動(dòng) v. 代 pron. 形 adj. 連 conj. 副 adv. 嘆 interj. 數(shù) num. 冠 art. Personal pronouns We often use personal pronouns to refer to people or things that we have already mentioned. We use them when it is clear who or what we are talking about . There are two main sets of personal pronouns : _______________________________ and _______________________