锟竭匡拷英锟絑锟絑锟斤拷锟斤拷锟絚一

锟斤拷锟斤拷1. 锟絑锟紹(t锟斤拷i)锟酵時锟紹(t锟斤拷i)

锟斤拷锟斤拷—Do you see those people on the little sandy island?

锟斤拷锟斤拷—Yes, they _______ handkerchiefs for the last half hour. I wonder why.

锟斤拷锟斤拷A. were waving B. waved C. had waved D. have been waving

锟斤拷锟斤拷锟斤拷锟斤拷锟絖锟金案★拷D

锟斤拷锟斤拷锟斤拷锟竭匡拷锟斤拷锟絚锟斤拷锟斤拷锟斤拷锟斤拷~锟絩锟紹(t锟斤拷i)锟�锟斤拷F(xi锟斤拷n)锟斤拷锟斤拷锟斤拷M锟叫時锟斤拷锟斤拷示一锟斤拷锟斤拷锟絕去某一锟絩锟斤拷锟絖始锟侥勶拷锟斤拷锟斤拷一直锟斤拷锟絤(x锟斤拷)锟斤拷锟絝話锟絩還锟斤拷锟組锟叫或剛結(ji锟斤拷)锟斤拷锟斤拷锟斤拷锟叫筹拷锟斤拷锟紽(xi锟斤拷n)锟斤拷for, since, how long锟斤拷锟斤拷锟斤拷(d锟斤拷o)锟侥時锟絞锟斤拷锟絑锟斤拷e.g. His telephone has been ringing for a long time.e.g. It has been raining since last Sunday. e.g. How long have you been wearing glasses?

锟斤拷锟斤拷锟斤拷锟絵锟缴撅拷锟解】“锟斤拷锟叫沒锟叫匡拷見锟斤拷些锟斤拷小锟絬锟较碉拷锟斤拷?”“锟角的ｏ拷锟揭匡拷見锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絕去锟侥帮拷小锟絩锟斤拷一直锟节揮锟斤拷锟斤拷锟斤拷锟揭诧拷知锟斤拷锟斤拷什么锟斤拷”

锟斤拷锟斤拷锟斤拷詳锟斤拷锟斤拷锟斤拷锟斤拷锟紷锟斤拷锟絔锟斤拷锟斤拷锟侥勶拷锟斤拷锟斤拷锟节帮拷小锟絩前锟絖始锟斤拷锟斤拷然锟斤拷一直锟节揮锟斤拷一直锟絔锟斤拷锟斤拷锟絝話锟斤拷锟紷锟斤拷锟絩锟斤拷锟斤拷锟斤拷锟斤拷锟揭傦拷锟矫碉拷锟斤拷一锟斤拷锟紽(xi锟斤拷n)锟斤拷锟斤拷锟斤拷M锟叫時锟斤拷锟斤拷锟絳(di锟斤拷o)一锟斤拷锟斤拷锟斤拷锟侥筹拷锟絤(x锟斤拷)锟斤拷锟揭傦拷锟劫侊拷锟斤拷一锟斤拷锟斤拷锟斤拷锟阶傦拷锟絩锟紹(t锟斤拷i)锟斤拷

锟斤拷锟斤拷A锟絰锟斤拷锟絯ere waving——锟絕去锟組锟叫時锟斤拷锟斤拷指锟斤拷锟角ｏ拷锟斤拷锟絕去某一锟絩锟斤拷锟斤拷锟斤拷锟組锟斤拷;锟斤拷锟絕去某一锟紸锟斤拷锟斤拷锟斤拷锟組锟斤拷;B. waved——锟絕去锟絩锟斤拷锟絕去某锟絩锟絞锟絣(f锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷傻膭锟斤拷锟�锟斤拷锟斤拷锟斤拷锟揭傦拷知锟斤拷A锟斤拷B锟紷锟缴傦拷锟絩锟紹(t锟斤拷i)锟斤拷锟角猴拷锟絕去锟斤拷锟絇(gu锟斤拷n)锟斤拷锟斤拷锟酵現(xi锟斤拷n)锟斤拷锟角沒锟斤拷一锟絚锟絇(gu锟斤拷n)系锟斤拷锟斤拷锟斤拷锟斤拷A锟斤拷B锟紷锟缴傦拷锟斤拷锟絜锟斤拷锟斤拷

锟斤拷锟斤拷C. had waved——锟絕去锟斤拷蓵r锟斤拷锟絕去某一锟絩锟教伙拷某一锟斤拷锟斤拷前锟斤拷傻膭锟斤拷锟斤拷锟斤拷B(t锟斤拷i)锟斤拷锟斤拷么锟斤拷锟斤拷锟斤拷锟絖锟侥時锟斤拷锟斤拷锟斤拷锟絕去锟斤拷锟絕去锟斤拷锟斤拷锟界：e.g. By the end of last year, we had built 5 new schools.锟斤拷去锟斤拷锟斤拷诪锟街�锟斤拷锟揭傦拷锟窖斤拷(j锟斤拷ng)锟斤拷锟斤拷锟斤拷5锟斤拷锟絎校锟斤拷锟斤拷锟饺ｏ拷锟絕去锟侥時锟絞锟斤拷去锟斤拷锟斤拷锟�;锟斤拷锟斤拷锟接憋拷锟絖锟斤拷锟斤拷思锟斤拷锟斤拷去锟斤拷锟斤拷锟街�前锟斤拷锟斤拷锟斤拷锟揭傦拷锟斤拷锟絕去锟斤拷蓵r——had build.锟酵現(xi锟斤拷n)锟斤拷锟角革拷锟接沒锟斤拷聯(li锟斤拷n)系锟剿ｏ拷锟斤拷锟斤拷锟紷锟斤拷锟斤拷也锟角诧拷锟斤拷锟絖锟斤拷锟斤拷

锟斤拷锟斤拷锟絵锟斤拷锟叫的時锟絞锟斤拷锟絑锟斤拷“for the last half hour”锟斤拷注锟斤拷锟紷锟斤拷last锟斤拷锟斤拷指“锟斤拷锟斤拷”锟斤拷锟斤拷锟斤拷指“锟斤拷锟脚碉拷——锟节勶拷锟脚的半個小锟絩锟斤拷”锟斤拷锟斤拷么锟斤拷锟斤拷锟截撅拷锟叫筹拷锟紽(xi锟斤拷n)last,锟斤拷锟斤拷锟斤拷last half hour锟斤拷recent锟紷锟絅锟絶锟斤拷話锟斤拷锟揭傦拷一锟姐都锟斤拷锟絰锟斤拷F(xi锟斤拷n)锟斤拷锟斤拷锟斤拷M锟叫時锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷锟�“锟斤拷锟斤拷”锟斤拷锟斤拷么锟较讹拷指“锟侥勶拷锟脚碉拷锟紽(xi锟斤拷n)锟斤拷”锟斤拷锟斤拷锟皆憋拷锟絵锟斤拷锟斤拷D.

锟斤拷锟斤拷锟竭匡拷英锟絑锟絑锟斤拷锟斤拷锟絚锟斤拷

锟斤拷锟斤拷锟斤拷锟絶锟皆從撅拷

锟斤拷锟斤拷The information could be helpful to ____will take over the job.

锟斤拷锟斤拷A. those B. who C. whoever D. anyone

锟斤拷锟斤拷锟斤拷锟斤拷锟絖锟金案★拷C

锟斤拷锟斤拷锟斤拷锟竭匡拷锟斤拷锟絚锟斤拷锟斤拷锟斤拷锟斤拷锟絶锟皆從撅拷锟斤拷锟斤拷锟剿硷拷x锟斤拷锟斤拷锟斤拷锟絶锟斤拷锟斤拷锟缴充當锟斤拷锟絑锟斤拷锟斤拷锟絑锟斤拷锟絜锟絑锟斤拷同位锟絑锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷(y锟斤拷ng)锟斤拷锟斤拷锟絶锟皆從撅拷也锟街烇拷锟斤拷锟斤拷锟絑锟侥撅拷锟斤拷锟斤拷锟絑锟侥句、锟絜锟絑锟侥撅拷锟酵�位锟絑锟侥撅拷锟斤拷锟斤拷锟絵锟斤拷锟侥撅拷锟角斤拷锟絶to锟斤拷锟斤拷e锟絑锟侥撅拷锟斤拷

锟斤拷锟斤拷锟斤拷锟絵锟缴撅拷锟解】“锟紷锟斤拷锟斤拷息锟斤拷锟杰曪拷锟斤拷锟轿何岋拷锟接癸拷锟紷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷”whoever = anyone who“锟轿猴拷锟斤拷么锟斤拷么锟接碉拷锟斤拷”锟斤拷锟斤拷锟紷锟斤拷锟斤拷锟斤拷锟斤拷锟絖锟斤拷锟斤拷锟揭傦拷锟劫侊拷锟斤拷锟斤拷锟斤拷锟阶傦拷锟金案烇拷什么锟斤拷锟斤拷锟斤拷?

锟斤拷锟斤拷锟斤拷詳锟斤拷锟斤拷锟斤拷锟斤拷A锟絰锟斤拷锟絫hose锟斤拷锟斤拷锟絫hose锟斤拷锟斤拷锟紷锟斤拷锟皆掞拷蜁锟阶冿拷锟饺憋拷锟斤拷P(gu锟斤拷n)系锟斤拷锟絶who锟斤拷锟斤拷锟絰those锟斤拷锟斤拷those will take over the job“锟斤拷些锟剿岋拷锟斤拷取锟斤拷锟紷锟斤拷锟斤拷锟斤拷”锟斤拷锟斤拷锟斤拷變锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟侥撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟侥撅拷锟斤拷锟斤拷锟接就诧拷锟斤拷一锟斤拷锟絜锟絑锟侥撅拷锟斤拷锟斤拷锟斤拷锟皆忥拷原锟絫锟斤拷锟絝锟斤拷锟斤拷锟絜锟絗锟斤拷锟斤拷锟斤拷么锟斤拷锟斤拷锟侥诧拷锟斤拷锟斤拷锟絖锟斤拷锟斤拷?锟杰猴拷锟轿ｏ拷只要锟斤拷锟紷锟斤拷those锟侥猴拷锟斤拷锟揭伙拷锟斤拷P(gu锟斤拷n)系锟斤拷锟絶who锟斤拷锟斤拷锟斤拷變锟斤拷一锟斤拷锟斤拷锟絑锟侥撅拷——those who will take over the job锟斤拷“锟斤拷些锟斤拷要锟接癸拷锟紷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷”锟斤拷锟斤拷么锟紷锟接就匡拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷B锟絰锟斤拷锟絯ho锟斤拷锟斤拷锟絶锟皆從撅拷锟叫憋拷示锟缴嗭拷锟斤拷e.g. Who will take over the job has not been decided yet. D锟絰锟斤拷锟絘nyone锟斤拷锟絜锟絗锟斤拷原锟斤拷也锟斤拷缺锟斤拷锟絇(gu锟斤拷n)系锟斤拷锟絶who.

锟斤拷锟斤拷锟斤拷锟絕those who锟斤拷anyone who锟斤拷前锟斤拷锟斤拷“锟斤拷些……锟斤拷锟斤拷”锟斤拷锟斤拷锟竭憋拷示“锟轿猴拷……锟斤拷锟斤拷”锟斤拷锟絕(q锟斤拷)锟絜锟斤拷锟斤拷锟斤拷锟斤拷those who锟斤拷一锟斤拷锟斤拷(f锟斤拷)锟斤拷(sh锟斤拷)锟侥革拷锟斤拷锟斤拷“锟斤拷些锟斤拷”锟斤拷锟斤拷锟斤拷锟斤拷^锟絑锟斤拷锟絶要锟矫忥拷(f锟斤拷)锟斤拷(sh锟斤拷);锟斤拷anyone who锟角憋拷示锟轿猴拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟矫單旓拷(sh锟斤拷)锟斤拷锟絕锟絑锟斤拷锟絶锟斤拷

锟斤拷锟斤拷锟竭匡拷英锟絑锟絑锟斤拷锟斤拷锟絚锟斤拷

锟斤拷锟斤拷虛锟組锟絑锟斤拷锟斤拷锟紹(t锟斤拷i)锟斤拷锟絶

锟斤拷锟斤拷—David, we went to Lake Geneva for the weekend.

锟斤拷锟斤拷—That _______ a very nice change. I wish I had gone there.

锟斤拷锟斤拷A. must be B. must have been C. could be D. could have been

锟斤拷锟斤拷锟斤拷锟斤拷锟絖锟金案★拷B

锟斤拷锟斤拷锟斤拷锟竭匡拷锟斤拷锟絚锟斤拷锟斤拷锟斤拷锟斤拷B(t锟斤拷i)锟斤拷锟絶锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷A锟斤拷B锟斤拷锟芥都锟斤拷must锟斤拷must锟斤拷锟狡測锟斤拷锟斤拷锟斤拷示“锟较讹拷…”锟斤拷锟紷锟斤拷锟絑锟斤拷锟角非筹拷锟絖锟斤拷锟斤拷锟斤拷锟劫凤拷之锟劫碉拷;锟斤拷么锟斤拷must锟斤拷锟狡測锟侥時锟斤拷锟斤拷锟斤拷锟斤拷還锟斤拷锟皆憋拷示锟斤拷同锟侥時锟絞锟斤拷锟斤拷锟界：

锟斤拷锟斤拷锟斤拷一锟斤拷must be锟斤拷示锟斤拷锟斤拷“锟紽(xi锟斤拷n)锟节的狅拷B(t锟斤拷i)”锟斤拷He must be a teacher. 锟斤拷锟较讹拷锟斤拷一锟斤拷锟较庯拷锟斤拷

锟斤拷锟斤拷锟节讹拷锟斤拷must be doing锟斤拷示“锟紽(xi锟斤拷n)锟斤拷锟組锟叫的勶拷锟斤拷”锟斤拷They must be having a meeting in the office.锟斤拷锟斤拷锟紽(xi锟斤拷n)锟节肯讹拷锟斤拷锟斤拷锟絢锟斤拷锟斤拷锟斤拷锟絖锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷must have done锟斤拷示“锟絕去锟絣(f锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷”锟斤拷You must have met him yesterday.锟斤拷锟斤拷锟斤拷隙锟揭婏拷^锟斤拷锟斤拷锟斤拷讓锟揭傦拷锟斤拷一锟铰岋拷“must have been”锟筋到锟絵锟斤拷锟斤拷锟斤拷锟角凤拷锟斤拷锟絖?锟斤拷锟解：“David,锟揭傦拷锟斤拷末去锟斤拷锟秸冿拷(n锟斤拷i)锟竭猴拷锟斤拷”“哦锟斤拷锟角肯讹拷锟斤拷一锟斤拷锟角筹拷锟矫的革拷變锟斤拷锟斤拷希锟斤拷锟斤拷也去锟斤拷锟斤拷锟剿★拷”锟紷锟斤拷锟角憋拷示一锟斤拷锟较讹拷锟斤拷锟狡測;锟斤拷锟斤拷锟斤拷锟斤拷蟼锟斤拷锟侥╋拷锟斤拷锟斤拷锟�锟斤拷锟絝锟斤拷锟紷锟斤拷锟斤拷锟斤拷锟窖斤拷(j锟斤拷ng)锟絣(f锟斤拷)锟斤拷锟斤拷锟斤拷锟揭傦拷锟斤拷锟斤拷锟斤拷B. must have been,锟斤拷锟斤拷锟斤拷A锟斤拷

锟斤拷锟斤拷锟斤拷詳锟斤拷锟斤拷锟斤拷锟斤拷C锟絰锟斤拷锟絚ould锟絧微锟侥戯拷锟缴伙拷委锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷“锟斤拷锟斤拷”e.g. His story could be true, but I hardly think it is.锟斤拷锟斤拷锟絝锟斤拷锟紷锟斤拷锟斤拷锟铰匡拷锟斤拷锟斤拷锟斤拷锟�锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟较诧拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷D锟絰锟斤拷锟絚ould have done虛锟組锟絑锟解，某锟斤拷锟絕去锟叫匡拷锟杰發(f锟斤拷)锟斤拷锟斤拷锟斤拷锟紿锟絔锟斤拷锟斤拷“锟斤拷锟斤拷锟斤拷锟斤拷”锟斤拷锟斤拷示锟斤拷惜锟斤拷锟絲锟斤拷锟斤拷e.g. The accident could have been prevented.锟紷锟斤拷車锟斤拷原锟斤拷锟角匡拷锟皆憋拷锟斤拷锟�锟斤拷e.g. You could have done better, but you didn’t try your best.锟斤拷原锟斤拷锟角匡拷锟斤拷锟斤拷锟侥革拷锟矫碉拷锟斤拷锟斤拷锟斤拷锟姐并锟絔锟叫盡锟皆硷拷锟斤拷锟斤拷努锟斤拷锟斤拷