一、 把一般现在时改为过去时。
（1）①I am a student.( 改be动词) am/ is/ are--was/were
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②He is a doctor.
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③She is a teacher.
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④They are my friends.
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(2)①Gogo goes to school by bike.(改动词)
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②I like mangoes.
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③They play basketball.
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二、把一般现在时改为现在进行时。（现在进行时：be+Ving）
1)I go to the park.
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2)They listen to the radio.
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3)She does her homework.
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三、把一般现在时改为一般将来时。（将来时：be going to/will+V原）
1)I go to the park.
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2)They watch TV every day.
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3)Jenny sings a song .
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四、把一般现在时改为过去进行时。[过去进行时：be( was/were)+Ving]
1)I stay in a hotel.
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2)They have fun with friends.
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