Can- Can´t; Have to-Has to, Don´t have to- Doesn´t have to

 Can

Restaurant Account Conversation 

- Hi Julio 

+ Hi Boss, how are you? 

- I'm very well. Well, Camila, I have to ask you a question. 

+ Yes, tell me. 

- By tomorrow, can you give me the accounts for the month? 

+ Yes, boss, I can give it to you at 2 p.m. Is that okay?

- Yes, yes, perfect. Thank you, Camilla. 

- You're welcome, boss. 

Can´t

Letter to my mother: 

Hi mom, how are you, I won't be able to attend the dinner tomorrow, as, I have a lot of work to deliver. If you wish we can meet next week, on Saturday, I am attentive. See you later mom. 

Have To- Has To 

Prayers 

My mom has to go shopping for handbags for my grandmother. 

My brothers have to go out to study.

Classmates have to talk about midterms. 

My dad has to go out to buy dinner.

My cousin has to talk to me about some work. 

Don't Have To- Doesn't Have To

Prayers 

My mom doesn't have to go shopping for handbags for my grandmother 

My sisters don't have to go out to study 

My dad doesn't have to go out to buy dinner