1一般现在时do/does2一般过去时did3现在进行时am/is/aredoing4过去进行时was/weredoing5现在完成时have/hasdone6过去完成时haddone7一般将来时am/is/are/goingto/willdo8含情态动词情态动词+do(以do为例,完成表格)Wehaveanoldmusicalinstrument
Itiscalledaclavichord
ItwasmadeinGermanyin1681
Ourclavichordiskeptinthelivingroom
Ithasbelongedtoourfamilyforalongtime
Theinstrumentwasboughtbymygrandfathermanyyearsago
Recentlyitwasdamagedbyavisitor
Shetriedtoplayjazzonit
Shestruckthekeystoohardandtwoofthestringswerebroken
Myfatherwasshocked
Nowwearenotallowedtotouchit
Itisbeingrepairedbyafriendofmyfather's
Afterreadingthepassage,whichgrammaritemdoyouthinkthepassageused
PassiveVoiceThepassivevoiceinThepassivevoiceinbasicwritingbasicwriting被动语态在基础写作中的运用Airplanesareslowlydrivingmemad
Ilivenearanairportandpassingplanescanbeheardnightandday
Theairportwasbuiltyearsago,bu