TENSES
5. The Present Continuous Tense 主要表示现在或现在这一阶段正在进行的动作。 is/am/are doing 1) 结构 (Passive) is/am/are being done
2) 主要用法： ① 表示说话的时刻正在进行的动作。 --- What are they doing? --- They are playing in the garden. The teacher is talking with his students now. Look, she is watering the flowers in the garden.
② 表示现阶段正在进行的动作, 尽管此刻这个动作可能并不在进行。 The manager is typing his letters these days. We are doing an experiment this week. How are you getting on with your classmates?
③ 表示将来发生的动作。限于一些表示起始和移动等意义的动词。例如： leave, go, come, arrive, start, etc. The train is arriving soon. They are going abroad for holidays. We are leaving for Shanghai tomorrow.
④ 表示满意，称赞，关切，抱怨，不满等情感。常与always, forever, constantly, continually等词连用。 He is always helping people.
*现在进行时所表示的动作具有临时性、生动性、非完全性等特点。 He is living in Beijing. He is walking to work because his bicycle is being repaired.
⑤ 表示知觉状态、具有感情类的动词，一般不可用于进行时态。如： have, belong, know, see, love, remember, like, want, realize, seem, become, etc. I have two brothers. This house belongs to my sister. He loves his motherland very much. You seem a little tired.
3) 动词现在分词的变化规则。 ①一般在动词末尾加-ing。 think---thinking go---going ②以不发音字母e结尾的动词，先去掉e,再加-ing。 come---coming make----making ③以重读闭音节结尾的动词，应双写末尾的辅音字母，再加-ing。 put---putting run---running