一般将来时：主语+will+动词原型+其他。
eg.I will arrive in Beijing after school
一般过去式：主语+动词的过去式+其他
主语+was/were+其他
eg.I played basketball yesterday
I was crazy for the things you do yesterday
一般现在时：主语+am/is/are+其他
主语+动词原型或动词的单三+其他
eg.I want to play with you
She wants to play with me
现在进行时：主语+am/is/are+动词的现在分词（v.-ing）+其他
eg.I am playing computer games at home now
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