period 3.
step 1. revision
check the answers of wb ex 1 and 2 on page 56 .
step 2. discovering useful structures
1. ss look at the following sentences and underline the verbs.
are you working this evening?
we’re having an english party this weekend.
he is leaving tomor资源难易程度:★★★★★★★★★★★★★★★
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