1)、By the time you arrive in London,we_____(stay)in Europe for two weeks.
will have stayed
注意arrive的一般時態表示將來的動作。
2)、The first two factors must be equal for all who are being compared,if any comparison in terms of intelligence____(make)
is to be made
be(am/is/are;was/were)和不定式連用,可以表示多種意思,并常用于條件從句(如果想要……)。
3)、While you were in London that year,the London Bridge_____(repair).
was being repaired
while+主語+謂語(一般過去時或過去進行時)表示過去某段時間內主語的狀態或正在進行的動作,所以主句謂語應用過去進行時。
4)、John is’t a diligent student,for it is the third time he____(be)late,isn’t it?
have been
在it is the third time的句型中常用現在完成時。
5)、John always works in his lab and makes a lot of experiments,He___(make)experiments all afternoon and____(not finish)yet.
have been making
have not finished
6)、It___(be)very cold lately,but it’s beginning to get a bit warmer.
has been
注意lately,表示“近來”recently。