1.The Impending Aspect: In Chinese, when indicating an action is going to happen very soon, one can (1)put any of the adverbs 要,快,就要,快要 before the main verb or the predicative adjective; and (2)put the particle 了at the end of the sentence. For example: 飞机 就要 起飞 了。 The airplane is about to take off. subj. v. 电影 快 开始 了。 The movie is going to begin soon. subj. v. 晚饭 要 冷 了。 The dinner is going to be cold soon. subj. pred. adj. Note: (1)To form a question, one can add 吗 or 吧 to the end of the sentence. For example: 你爸爸快起床了吗/吧？ Is your Dad getting up soon? 你就要回台湾了吗/吧？ Are you about to return to Taiwan? The affirmative answer to the question is 对 or 是 .The negative answer will be 没 (有)or 还没(有)呢 . For example: 天气快热了吧？ 对/是。 Is the weather getting hot? Yes. 你们就要考试了吗？ 还没呢。 Are you having an exam? Not yet. (2) If there is a time phrase such as 明天,五点,in the sentence to indicate the specific time when the action is going to take place, ONLY 就要...了 can be used. For example: 我弟弟五点半就要吃饭了。 My younger brother is having dinner at 5:30. 他说他妈妈明天就要来了。 He said that his mom is coming tomorrow. 他们十一点就要到北京了。 They are arriving at Beijing at 11:00. 2.The Imperative Sentence: We have come across sentences such as: 吃饭！ Eat! 请喝茶！ Have tea, please! 我们走吧。 Let’s go. Sentences like those are known as IMPERATIVE SENTENCE. An imperative sentence is used to express a suggestion, advice, or to make a command. To form a negative imperative sentence, one can put either 别 or 不要 before the main verb or the predicative adjective. For example: 别/不要吃饭！ Don’t eat! 请别/不要喝茶！ Please don’t drink tea. 我们别/不要走吧！ Let’s not go. Note that to soften the tone of an imperative sentence, one can add the particle 了 to the end of the sentence. For example: 上飞机了！ On borad (the plane)! 别说话了！电影就要开始了。 Don't talk! The movie is about to start. 3.The expression 怎麽行: The expression 怎麽行 is often used as a rhetorical question. It translates into English roughly as “Would it be OK?” For example: 你不吃饭，怎麽行？ You won’t eat. Would it be OK? 学汉语不作作业，怎麽行？ Study Chinese, and won’t do the homework. Would it work?