| 词组 | verb verb auxiliary verbs |
| 释义 | Contents overview verb + verb : auxiliary verbs15 verb + verb: auxiliary verbs1the need for auxiliary verbsIn English sentences, a lot of important meanings are expressed by the verb phrase – for example questioning, negation, time, completion, continuation, repetition, willingness, possibility, obligation. But English verbs do not have many different one-word forms: the maximum (except for be) is five (e.g. see, sees, seeing, saw, seen). So to express all these meanings, 'auxiliary' (or 'helping') verbs are added to other verbs. There are two groups.2be, do and haveBe is added to other verbs to make progressive and passive forms.Is it raining?She was imprisoned by a military court.Do is used to make questions, negatives and emphatic forms of non-auxiliary verbs.Do you smoke?It didn't matter.Do come in.Have is used to make perfect forms.What have you done?I realised that I hadn't turned the lights off.For details, Section 2.3modal auxiliary verbsThe verbs will, shall, would, should, can, could, may, might, must and ought are usually called 'modal auxiliary verbs'. They are used with other verbs to add various meanings, mostly to do with certainty or obligation.She may be in Mexico.You must call Uncle Arthur.For details, Section 7.4other verb + verb structuresOther verbs (e.g. seem) which are used in verb + verb structures are not usually called 'auxiliary verbs'. One important difference is grammatical. In auxiliary verb structures, questions and negatives are made without do; in other verb + verb structures the auxiliary do has to be added to the first verb. Compare:–She should understand.Should she understand?–She seems to understand.Does she seem to understand?–He is swimming.He is not swimming–He likes swimming.He doesn't like swimming.For more about these structures, 16.Previous Next |
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英语用法大全包含1354条英语用法指南，基本涵盖了全部常用英文词汇及语法点的翻译及用法，是英语学习的有利工具。