Write the following sentence in the simple past tense, past progressive tense and future tense.
请将下面的句子改写成一般过去时, 过去进行时和一般将来时.
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Discuss what has changed in the last twenty years in Guangzhou past tense and perfect tense.
学生四人为单位进行小组讨论,写下与广州的变化有关的关键词.
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Several verbs have alternative regular and irregular past tense and past participle forms.
有些动词兼有规则和不规则的过去式和过去分词的形式.
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It was as though Corinne was already dead: they were speaking of her in the past tense.
科琳娜好像已经去世了：他们谈论她时用的是过去时。
《柯林斯高阶英汉双解学习词典》
They were all concerning about the past tense and the present perfect.
那些练习题都是跟一般过去时和现在完成时有关的。
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然后，作者利用SPSS对所得数据进行分析并有如下发现：（1）汉语时的缺失对中国英语学习者习得一般过去时有阻碍作用。
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A Semantic Study of the English Simple Past Tense and the Present Perfect
实话英语的时态一般过去时和现在完成体的语义研究
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I recommend using a similar structure for almost any Part 2 past or present tense topics!
对于第二部分任何一个现在时或过去时的话题,我都推荐使用这样一个相似的结构.
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我要去做一些难度更大、回报更少的事情：找到我儿子，看看是否可以威逼利诱，让他去学avoir和être的过去时。
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