发布网友 发布时间:2022-10-08 02:06
共3个回答
热心网友 时间:2023-11-01 15:55
1. AUXYou use be with a present participle to form the continuous tenses of verbs. 后接动词的现在分词,构成动词进行体
例:This is happening in every school throughout the country.
这在全国各校都正在发生。
例:She didn't always think carefully about what she was doing.
她不总是仔细思考自己正在做什么。
2. be going to
See: going3. AUXYou use be with a past participle to form the passive voice. 后接动词的过去分词,构成被动语态
例:Her husband was killed in a car crash.
她丈夫在一场车祸中被夺去了性命。
例:Similar action is being taken by the U.S. government.
类似的行动正被美国*所采取。
4. AUXYou use be with an infinitive to indicate that something is planned to happen, that it will definitely happen, or that it must happen. 后接动词不定式,表“安排、注定、必然”等意
例:The talks are to begin tomorrow.
会谈将于明天开始。
例:It was to be Johnson's first meeting with the board in nearly a month.
那将是近一个月来约翰逊与董事会的首次会面。
5. be about to
See: about6. AUXYou use be with an infinitive to say or ask what should happen or be done in a particular situation, how it should happen, or who should do it. 后接动词不定式,用于说明或询问特定情况下应该会怎样、怎样做、谁来做等
例:What am I to do without him?
没有他我该怎么办?
例:Who is to say which of them had more power?
谁知道他们当中谁有更大权利?
7. AUXYou use was and were with an infinitive to talk about something that happened later than the time you are discussing, and was not planned or certain at that time. was和were接不定式表示说话时间之后发生的事
例:He started something that was to change the face of China.
他发起了某项后来改变了中国面貌的行动。
8. AUXYou can say that something is to be seen, heard, or found in a particular place to mean that people can see it, hear it, or find it in that place. 后接seen、heard、found,表“可见到、可听到、可发现”之意
例:Little traffic was to be seen on the streets.
路上几乎没有车辆可见。
热心网友 时间:2023-11-01 15:56
am/ is/ are/was/ were 是系动词的具体形式热心网友 时间:2023-11-01 15:56
be doing sth.是am is are.过去式是was were.在不同的地方有不同用法