英语词汇must怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

	Must is usually followed by an infinitive without ‘to’ must 通常后接不带to 的不定式: You must stop at the red light. 红灯时必须停下。 Sometimes must is used without a following infinitive有时must 后面不接不定式: We will act alone if we must. 如果必须的话我们将单独行动。

	Must does not change its form, so the third person singular form does not end in ‘-s’ must没有词形变化，因此第三人称单数不以 s 结尾: She must be asleep. 她一定是睡着了。

	Questions are formed without ‘do’ 构成疑问句时不用do: Must we wear our uniforms? 我们必须穿制服吗？ Must can be used in question tagsmust可以用在附加疑问句中: We mustn’ t be late, must we? 我们决不能迟到，对吗？

	The negative form must not is used for saying that something should not be done. This is often shortened in conversation or informal writing to mustn’ t 否定形式must not用于表示不应该做某事。在会话或非正式书面语中常被缩略为mustn’t: You mustn’ t use the office phone for private calls. 你决不可以用办公室电话打私人电话。

	For saying that it is not necessary to do something not have to , not need to , or needn’ t is used表示没必要做某事时用not have to， not need to 或者needn’t: Children don’ t have to pay to go in. 儿童不必购票就可入内。 You don’ t need to take the test. 你不必参加考试。

	There is no infinitive form of must , so to have to is used insteadmust 没有不定式形式，因此可用to have to 替代: I didn’ t expect to have to do my own cleaning. 我没有料想到还得自己打扫卫生。

	There is no past tense, but had to is used for saying that something was necessary in the pastmust没有过去式，但可用had to 来表示过去某事是必要的: We had to show our passports. 我们只好出示护照。 Must have followed by a past participle can be used for saying that you believe something happened in the pastmust have 后接过去分词时可以用来表示相信某事在过去发生过: They must have missed the train. 他们一定没赶上火车。 When indirect speech is introduced by a verb in the past tense, must can be used as a past tense当动词的过去式引导间接引语时， must 可以用作过去式: She said that I must come immediately. 她说我必须马上来。

	There is no future tense, but must can be used for saying that someone should do something in the futuremust没有将来时，但是可用于表示某人将来必须做某事: You must be here at nine o’ clock tomorrow morning. 你明天早上9点必须到这里。 For saying that something will be necessary in the future will have to can be used要表示将来某事是必需的，可以用will have to: Graham will have to sleep on the sofa. 格雷厄姆将不得不睡在沙发上。