Simple past of verb:finish

pastsimple(lo q hice ayer):+i studied english three years ago; - I didn´t (verb en present); ? Did you speak..?Past conti:+(I,he,she,it)was/(we, are, they)were : She was carrying..- wasn´t ; weren´t; ? was she writing...?/ were the students taking..?PresentPerfec:+(I,we,are,they) have studied../(he,she,it) has studied; - hasn´t/haven´t; ? has she studied..?; PresentConti: +I am/ (he,she,it) is/ (you,we,they) are...Reading*; - am not; isn´t; aren´t; ? Are you reading ?; used to(Solía): + he used to; - he didn´t use to; Did he use to?; Will(predicciones o decisiones en momento); Be going to(evidencia de que algo va a ocurrir, o cuando hay planes)