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《Grammar and usage(1)： To infinitive； Bare infinitive》新课标PPT课件优质课下载
To stay with friends is fun.
It’s fun to stay with friends.
Presentation1 友谊篇
To win friendship
is valuable.
It’s valuable to win friendship.
1
总结：动词不定式短语作_______时，谓语动词用________ 且常用it作形式主语。
主语
单数
Share with a good friend
It’s great fun to share with a good friend
Practice 1
be alone
It’s boring to be alone.
fun
boring
dangerous
It’s dangerous ________ you _________________(交朋友） on the Internet.
for
to make friends
It’s silly ________ you _______________(吵架） with your best friend about a tiny thing.
of
to quarrel
silly