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《Grammar》公开课PPT课件优质课下载
已完成 对现在的影响
持续到现在并可能持续下去的状态
Since the 1980s , plenty of forests _________ ( destroy) seriously around the world.
has been destroyed
It has been a long time since we last _____(see) such clear and blue sky.
saw
Because of war, a good many
people ___________ (leave) syria（叙利亚).
Now less people are staying there.
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have left
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In the past few years, global warming _______(make)
glacier begin melting(融化). It is one of the reasons
that the number of penguins ____________（drop).
This is the first time they ________ (feel) so hopeless
for the future. They ______(not be) used to life yet.
has made
has dropped