我以主语I,动词 do 为例给你例句，便于你理解。
一般现在：i do it by myself.
过去进行时：i was doing my homework when she came in .（be+doing（现在分词)）
现在完成时：i have done my work. (have/has +done(过去分词))
现在进行：i am doing my work. （be+doing（现在分词））
过去完成时：i had done my work last month. (had+done(过去分词))
过去将来时：i would go shopping with my friends. （would/should/might/was going to等+do(动词原形)）
一般过去：i did my work last night. （did/had等动词过去式）
一般将来：i will do my work. （will/ be going to / be about to do等结构）
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