The interrogative form is used -do or -does,for the thid person singolare,followed by form of the main verb.
es:What do you do at weekends? I go to the  cinema.
In the sport affirmative formos it is used -do and - does, in negative sport responsabile the contracted forms of the auxiliary are used.
es:Does James catch the bus to shool early? Yes,he does/ NO,he doesn't'.
In the negative form the auxiliary is used 
-do not,for the third person in the singular is used-does not (doesn't)folowed by the basic form of the main verb
es: We don't  play the piano.

PRESENT CONTINUOUS
is formed: with the verb -to be, followed by the main verb(form in:ing)
In some verbs is added-ing.
Vesbs Endine in -e moulting,removs the -e and add -ing, there are some exceptions lite the verb: age - ageing, the e remains and is added -ing.
Verbs Endine in- ie, it takes off and becomes
es: tie-tying.
Bisyllabic verbs,and monosyllables,whixh end with a consonant but bifore the consonat there is a vowel the consonant is doubled and added -ing

PAST SIMPLE
is formed: addirittura-ed  to the basic form of the verb, i verbk che terminano in -e online the -d( live-lived).
Verbs Endine in the consonant -y  take off and become -i and the you add -ed( study-stidied), when the -y and presente by a vowel,resta and then si aggiunge -end(play-played).
Monosyllabic end bisyllabic verbs end in a consonant and bifore the consonant there is a vowel,the consonante doubles and then adds -ed.