Complete the sentences with the past continuous tense.
用过去进行时完成句子。
Not all the verbs in English can be used in the present continuous tense.
英语中并非所有动词都可以用于进行时态，它有动态动词与静态动词之分。
What's the present continuous tense?
什么是现在进行时态？
Today, we are going to talk about the present perfect continuous tense.
今天，我们谈谈什么是现在完成进行时。
We use the present continuous tense to talk about things that are happening now.
我们使用现在进行时谈论现在正在发生的事情。
Question 49: What is the right use of the present continuous tense?
问题49：如何正确使用现在进行时？
Question 49: What is the right use of the present continuous tense?
问题49：如何正确使用现在进行时？
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