【正文】 表示約定、義務(wù)、命令等未來的動(dòng)作或狀態(tài)。 2) do+主詞 +原形動(dòng)詞構(gòu)成疑問句。 would +原形動(dòng)詞表示過去一段 時(shí)間的習(xí)慣。 could not (help) but 只能做某事。 must+原形動(dòng)詞表示對(duì)現(xiàn)在情況的推斷。t fet your medical card. Oh, it is wet outside. It must have rained yesterday. So it must be slippery outside. Do be careful! You needn39。t like English. 2. He is singing. 3. He has got married. 4. He was sent to England. 5. Do you like college life? 6. Did you study English before you came here? 7. Do e to the party tomorrow evening. 8. He did know that. Step 3 Presentation(PPT 624) Auxiliary verbs: be (am/is/are/was/were/been) do (does/did) have（ has/had） modals（ shall/should/will/would/can/ could/may/might/must/need/dare ） A phrasal auxiliary verb（ have (got) to, had better/would sooner/rather (? than)/cannot (help) but/be (not) to/be supposed to/ought to/used to/be about to/be able to） 1. be（ am/is/are/was/were/been） The small animals are kept in the cages. He is giving a lecture. The Inter has too much information that has not been evaluated for accuracy. Your house is bigger and nicer than mine. I am to go abroad on business tomorrow. Tip: 1） be作為本動(dòng)詞表示狀態(tài)或客觀存在等意思。 3) do+not+原形動(dòng)詞構(gòu)成否定句 。 4) can, could 在口語(yǔ)中相當(dāng)于 may, might,表示許可。 are supposed to 應(yīng)該做某事。 must+have+過去分詞表示對(duì)過去情況的推斷。t. You mustn39。 3. After learning auxiliary verbs, the students will apply what they’