英语中,“几倍”的表达方式主要有两种:“times”和“multiplied by”。两者之间有一定区别,具体如下:
1. “times”表示“倍”,用来表示一个数值是另一个数值的多少倍。例如:
- This shirt is three times more expensive than that one. 这件衬衫比那件贵三倍。
- The new car is twice as fast as the old one. 新车是老车的两倍快。
2. “multiplied by”也表示“倍”,但多用于数学计算或科学语境中,表示一个数值乘以另一个数值的结果。例如:
- The area of the room is 5 meters multiplied by 6 meters. 这个房间的面积是5米乘以6米。
- The speed of light is approximately 186,282 miles per second multiplied by the square root of -1. 光的速度约为每秒186,282英里乘以-1的平方根。
简而言之,“times”用于表示一个数值是另一个数值的多少倍,而“multiplied by”多用于表示一个数值乘以另一个数值的计算结果。
英语中共有12种时态:
1. 一般现在时:I eat breakfast every day.(我每天吃早饭。)
2. 现在进行时:I am eating breakfast now.(我现在正在吃早饭。)
3. 现在完成时:I have eaten breakfast.(我已经吃过早饭了。)
4. 一般过去时:I ate breakfast yesterday.(我昨天吃了早饭。)
5. 过去进行时:I was eating breakfast when you called me.(你打电话给我时我正在吃早饭。)
6. 过去完成时:I had eaten breakfast before you came.(你来之前我已经吃了早饭。)
7. 将来时:I will eat breakfast tomorrow.(我明天会吃早饭。)
8. 将来进行时:I will be eating breakfast at 7:00 tomorrow morning.(明天早上7:00我会正在吃早饭。)
9. 将来完成时:I will have eaten breakfast by the time you arrive.(你到达之前我会已经吃过早饭了。)
10. 现在完成进行时:I have been eating breakfast for 30 minutes.(我已经吃了早饭30分钟了。)
11. 过去完成进行时:I had been eating breakfast for 30 minutes when he came.(他来的时候我已经吃了早饭30分钟了。)
12. 将来完成进行时:I will have been eating breakfast for 30 minutes by 7:00 tomorrow morning.(明天早上7:00的时候我会已经吃早饭30分钟了。)
至于疑问句的结构,一般情况下都是将助动词放在主语前,构成“助动词+主语+谓语”的形式,例如:
- Are you hungry?(你饿了吗?)
- Does he like coffee?(他喜欢咖啡吗?)
- Did you go to the store yesterday?(你昨天去商店了吗?)
- Will she come to the party tonight?(她今晚会来参加派对吗?)
- Has he finished his homework yet?(他已经做完作业了吗?)
1 英语六级及以上水平能够对答如流。
2 因为英语六级及以上水平的人已经掌握了足够的词汇量和语法知识,可以流利地表达自己的思想和看法,对于常见的对话和问题也能够迅速作出回应。