... include can, could, may have to and must Modal verbs are verbs, which 'help' other verbs to express a meaning: it is important to realize that "modal verbs" have no meaning by themselves A modal ... is many other things A few basic grammatical rules applying to modal verbs Modal verbs are NEVER used with other auxiliaryverbs such as do, does, did etc The negative is formed simply by adding ... subject Modal verbs NEVER change form: you can never add an "-s" or "-ed" Modal verbs are NEVER followed by to, with the exception of ought to What sort of meanings modals give to other verbs? The...
... B Trong ví dụ have/can’t/was/do trợ động từ (auxiliary verbs) “Have you locked the door?” “Bạn khóa cửa chưa?” “Yes, I have.” (= I have locked the...
... primary auxiliaryverbsAuxiliaryverbs Foreign Languages Faculty Modal Primary auxiliaryauxiliary Dao Thi Thu Ha Graduation Paper I.3 Primary auxiliary verb There are three primary auxiliary verbs, ... primary auxiliaryverbs I.2 Auxiliaryverbs I.2.1 Definition Auxiliaryverbs are defined by many researchers Swan (1980, p 90) defines auxiliaries as following Auxiliary or helping verbs are ... command) I.3.4 Comparison modal auxiliaryverbs with primary auxiliaryverbs This part discusses how primary auxiliaryverbs are different from modal auxiliaryverbs Quirk, Greenbaum, Leech &...