Change this verb from the present tense into the past tense and future tense.
把这个动词从现在时改为过去时和将来时。
Present tense ranks the first, next are past and future tense in primary tense.
现在时位于主要时态中第一位，其次是过去时和将来时。
Reading in English, learning grammar, to learn of the past, present tense and future tense.
读英文，学习文法，要学好过去式，现在式和未来式。
Reading in English, learning grammar, to learn of the past, present tense and future tense.
读英文，学习文法，要学好过去式，现在式和未来式。
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