时态是表示行为、动作、状态在各种时间条件下的动词形式。时态也是英语学习的重点内容。下面是小编收集整理的小学四年级英语时态练习题,大家一起来看看吧! 小学四年级英语时态练习题: ( ) I My students___each other. A. are always helping B. always helps C. always are helping D. help always ( ) 2 How tired I am, for my little son ___. A. is always crying B. cry C. never cries D. always cry ( ) 3 Don't forget to bring your pen and books. You___to bring these things. A. are always forgotten B. are always forgetting C. are always forget D. forget always
( ) 4 My father___ breakfast at home every day. A. hasn't B. isn't having C. doesn't have D. has had ( ) 5 I ___ supper when the boy broke in. A. has B. have C. was having D. will have ( ) 6 We ___ no class on Sundays. A. had B. have C. has D. are having 参考答案:1-6 A A B C C B 过去进行的重要用法: 1. 表示临时性 即表示在过去短期内正在进行的动作或存在的临时情况,这种情况通常不会长期如此。如: It happened while I was living in Paris last year. 这件事发生于去年我住在巴黎的时候。
2. 表示计划 即表示为过去的将来计划或安排好的活动。这类用法在没有明确上下文的情况下,通常会连用一个表示将来时间的状语。如: He said that his sister was getting married next December. 他说他妹妹12月结婚。 用arrive, come, go, leave, take off等动词的现在进行时描写行程安排,也通常有含有将来意义。如: He said he was leaving for home in a day or two. 他说他一两天之内就动身回家了。 She knew the plane was taking off in five minutes. 她知道五分钟后飞机就要起飞了。 现在进行时的用法: 1. 表示正在进行 现在进行时除表示说话时正在进行的动作之外,还可表示在短期内临时进行的动作或存在的情况,这种情况通常不会长期如此,并且在说话时刻也不一定正在进行。如: Don’t take that ladder away. Your father’s using it. 别把梯子拿起,你父亲在用哩。 The professor is typing his own letters while his secretary is ill. 秘书生病时,教授自己打他的信。 2. 表示短期内在进行 表示在短期内正在进行的动作或存在的情况,这种情况通常不会长期如此。如: Her car has broken down. She’s going to work by bike. 她的汽车坏了,骑自行车上班。 The professor is typing his own letters while his secretary is ill. 秘书生病时,教授自己打他的信。 这种情况在说话时不一定在发生。如: Don’t take that ladder away. Your father’s using it. 别把梯子拿走,你父亲在用哩。(说话时不一定正在用) 表示将来的常用非时态方式: 1. 用现在进行时表示将来:主要表示按规定或时间预计要发生的事。如: The students are leaving on Sunday. 学生们星期日出发。 We’re having a party next week. 我们下星期将开一个晚会。 2. 用一般现在时表示将来:表示按规定或时间预计要发生的事。如: We have a holiday tomorrow. 我们明天放假。 The train leaves at 10:04 this evening. 火车今晚10:04分开。
写人工智能的英语作文
如今人工智能影响着我们生活的方方面面,在英语中也有关于人工智能的作文题材,那你想知道写人工智能的英语作文怎么写吗?下面是小编收集整理的一些写人工智能的英语作文,大家一起来看看吧! 写人工智能的英语作文篇一:
英语学习
2020-10-22