Global warming Period 3 Grammar—the Use of “It”(2)
1it is what you do rather than what you say that matters.2it was after he got what he had desired that he realized it was not so important.3it was not until she got home that jennifer realized she had lost her keys.
suggested answers：
in these three sentences，the underlined parts are all clauses—a subject clause and two adverbial clauses.that is to say，the emphasized sentence can not only be used to emphasize subject，object and adverbial，but also be used to emphasize subject clauses and adverbial clauses.pay special attention to the third sentence，in which “not” and “until” must be put together.
then show the following two sentences to students and ask them to translate them into chinese.pay attention to the sentence pattern.
1was it in 1969 that the american astronauts succeeded in landing on the moon？2who was it that put so many large stones on the road？
suggested answers：(1)美國宇航員是于1969年成功登陸月球的嗎？
(2)究竟是誰在路上放了這么多大石頭？
the general question sentences and the wh－question sentences of the emphasized sentences should follow the following formulas：
is/was it＋被強調部分＋that＋其他部分
wh－疑問詞＋is/was it that＋其他部分
step 7 task－based learning
ask students to choose a topic they like(eg.global warming，wildlife，protection，music，film，etc).work in groups and try to tell the information they know about the topic using emphatic “it”.
examples：
it was during the 20th century that the temperature of the earth went up about one degree fahrenheit.
it was charles keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere.
step 8 closing down by a quiz
show students the following on the screen or give out test papers to them and then ask them to finish these exercises in 10 minutes.
1.was it in this place ______ they once built a tall building?
a.that b.in which
c.before d.which
2.it is ______ he often breaks the school rules ______ makes his head teacher unsatisfied with him.
a.what；that b.that；what
c.that；that d.because；that