Pai past la past simple(sau continuous) si past participle la present perfect si past perfect, timpuri care au structura : have/had + past participle. Ex.: I have just write this.
Se mai poate si la present perfect continuous: I have been doing this for 3 years. Deci structura e : S+have+ be la past participle+verb in ing...
mai sunt multe altele, in general atentie la adverbe, ele iti indica ce timp folosesti...