Simple past grammar

PRESENT SIMPLE 
+i play   he play
-i doesn't plat
?Do/does he play?
PRESENT CONTIN.
+i am playing
-i'm not playing/she isn't playing
?Am i playing?/ is she playing?
PAST SIMPLE
+i played
-i didn't play
?Did you play?
PAST CONTINU.
+i was playing
-i wasn't playing
?Were you playing?
HAVE TO/DONT HAVE TO (HAS DE../OBLIGACIÓ)+FORTA
+i have to...Study
-i don't have to...Do homeworks
?Do you have to...
MUST/MUSTN'T(HAS DE.../OBLIGACIÓ)
+i must arrive at 9 am
-i mustn'tarrive at 9 am
SHOULD/SHOULDN'T (HAURIES DE...RECOMANACIÓ)
+you should study
-you shouldn't study
? Should you...?
PRESENT PERFECT
+i have play
-i haven't play
?Have you play?
BE GOING TO(FUTUR SEGUR,PROXIM9
+i'm going to play
-i'm not going to play
?Am i going to play?
WILL
+i will play
-i won't play
?Will you play?
FIRST CONDITIONAL
(si) if + present simple,will+infinitive
*if you jump, you will play.