【文章內(nèi)容簡(jiǎn)介】
is often ss to work in groups and find out all the rules. 2. Cultivate Ss’ ability of concluding 5 used to refer to “the time, the season, the weather, the distance, the temperature” 4. Observe the three sentences and conclude it as the empty subject to replace a toinfinitive. 5. Study the rule of it as empty subject. 3. Help ss to work out the rule. 4. Help s