现在完成时/过去完成时/过去时的句形怎么组成

Do是指一般现在时,did是指过去时,done是用于完成时.
现在完成时是：have/has+done
例如：I have not seen (原形：see)you for one year.
过去完成时是；had+done
例如：I had (finished )the homework before the teather asked me.
过去时：只要用谓语动词的过去式,即did.例如：The teather( asked )me to do this test yesterday.