锟斤拷锟斤拷been锟斤拷be锟斤拷锟絕(gu锟斤拷)去锟斤拷锟絶锟斤拷done锟斤拷do锟斤拷锟絕(gu锟斤拷)去锟斤拷锟絶锟斤拷锟斤拷見(ji锟斤拷n)锟斤拷锟矫凤拷锟斤拷have done锟斤拷have been done锟斤拷have done锟斤拷锟斤拷锟斤拷(d锟斤拷ng)锟斤拷式锟侥現(xi锟斤拷n)锟斤拷锟斤拷锟绞斤拷锟絟ave been done锟角憋拷锟斤拷(d锟斤拷ng)式锟侥現(xi锟斤拷n)锟斤拷锟斤拷锟绞�锟斤拷

锟斤拷锟斤拷1锟斤拷done锟侥猴拷锟絰锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絑(y锟斤拷)锟矫凤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟絶adj.锟斤拷锟斤拷傻锟�锟斤拷锟斤拷锟斤拷模锟斤拷虾锟斤拷Y锟絰锟斤拷锟斤拷锟较猴拷規(gu锟斤拷)锟截的感嘆锟絶锟斤拷示锟斤拷锟杰斤拷锟絟锟斤拷锟斤拷(d锟斤拷ng)锟絶·锟斤拷锟斤拷do锟斤拷锟絕(gu锟斤拷)去锟斤拷锟絶锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷must+have+done锟斤拷锟斤拷示锟斤拷(du锟斤拷)锟絕(gu锟斤拷)去锟斤拷锟斤拷目隙锟斤拷茰y(c锟斤拷)锟斤拷锟絞锟斤拷“一锟斤拷锟斤拷锟絕(gu锟斤拷)某锟斤拷”锟斤拷該锟結(ji锟斤拷)锟斤拷(g锟斤拷u)只锟斤拷锟节肯讹拷锟斤拷锟斤拷

锟斤拷锟斤拷can't+have+done锟斤拷锟斤拷示锟斤拷(du锟斤拷)锟絕(gu锟斤拷)去锟斤拷锟斤拷姆锟斤拷茰y(c锟斤拷)锟斤拷锟絞锟斤拷“锟斤拷锟斤拷锟斤拷锟斤拷锟絕(gu锟斤拷)某锟斤拷”锟斤拷

锟斤拷锟斤拷can+have+done锟斤拷锟斤拷示锟斤拷(du锟斤拷)锟絕(gu锟斤拷)去锟叫烇拷膽锟斤拷锟�锟斤拷锟斤拷锟斤拷锟缴嗭拷(w锟斤拷n)锟斤拷锟斤拷锟絞锟斤拷“锟斤拷锟斤拷锟斤拷锟絕(gu锟斤拷)……锟结？”锟斤拷

锟斤拷锟斤拷may+have+done锟斤拷锟斤拷示锟斤拷(du锟斤拷)锟絣(f锟斤拷)锟斤拷锟絕(gu锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷茰y(c锟斤拷)锟斤拷锟斤拷思锟斤拷“锟斤拷锟斤拷锟窖斤拷(j锟斤拷ng)”锟斤拷“也锟絊锟窖斤拷(j锟斤拷ng)”锟斤拷锟斤拷锟节肯讹拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷2锟斤拷been锟侥猴拷锟絰锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷been锟斤拷be锟斤拷锟絕(gu锟斤拷)去锟斤拷锟絶锟斤拷锟斤拷锟絞锟斤拷“锟斤拷”

锟斤拷锟斤拷have been锟斤拷锟斤拷锟斤拷锟斤拷蓵r(sh锟斤拷)锟斤拷锟斤拷示“锟窖斤拷(j锟斤拷ng)锟絕(gu锟斤拷)去”

锟斤拷锟斤拷Scientists think that there has been life on Earth for millions of years

锟斤拷锟斤拷锟狡學(xu锟斤拷)锟斤拷锟絁(r锟斤拷n)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节碉拷锟斤拷锟窖斤拷(j锟斤拷ng)锟叫幾帮拷锟絝(w锟斤拷n)锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

锟斤拷锟斤拷锟竭匡拷英锟絑(y锟斤拷)知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟絉锟斤拷

锟斤拷锟斤拷get sth done锟斤拷have sth done锟侥區(q锟斤拷)锟絜

锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷(zh锟斤拷n)锟斤拷锟斤拷志愿锟斤拷锟�(b锟斤拷o)锟斤拷锟饺★拷锟�?j锟斤拷n)?sh锟斤拷)锟斤拷锟斤拷

锟竭匡拷锟絩(sh锟斤拷)锟絞锟斤拷锟斤拷全锟斤拷锟斤拷要锟斤拷(ji锟斤拷)锟絚(di锟斤拷n)

锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號(h锟斤拷o)