Formation: gonna = going + to

Usage: I'm gonna have to work every day next week.

Meaning: I'm going to have to work every day next week.

Formation: gotta = got + to

Usage: I gotta get up early to go work.

Meaning: I got to get up early to go work.

Formation: hafta = have + to

Usage: I hafta work overtime tonight.

Meaning: I have to work overtime tonight.

Formation: hasta = has + to

Usage: She hasta work this weekend.

Meaning: She has to work this weekend.

Formation: oughta = ought + to

Usage: You oughta find a better job.

Meaning: You ought to find a better job.

Formation: wanna = want + to

Usage: I really wanna find a better job.

Meaning: I really want to find a better job