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过去式
had 有，度过
went去
saw看
sang唱歌
ate吃
drank喝，饮
gave给
Warming-up
is/am
are
isn’t
aren’t
do/does
don’t/doesn’t
原形
过去式
was 是
were 是
wasn’t不是
weren’t不是
did 助动词
didn’t 没有
Warming-up
Look at the monkey.
He was thin then.
Warming-up
Warming-up
He ate and drank, ate and drank.
He is very fat now.