Dear reader, you should know that "Have" is one of the easiest words and one of the words that you must learn very well if you want to master English, and here are a number of lessons about it:
The verb have to is used as a main verb and mainly expresses general obligations and necessity and is used in the future, past and present.
Use "have to" in the future tense
1. "Have to" in the future consists of "pronouns + will + have to", examples:
- We will have to walk all the way to the station.
- I will have to get up early.
- I will have to postpone my appointment.
- They will have to run to catch up with Adam.
- She will have to take care of her sister.
2. "Have to" in the future tense when negation consists of "will not + have to", examples:
- You will not have to wait long.
- Consumers will not have to junk their old cassettes to use the new format.
- The debt of gravitational energy will not have to be paid until the end of the universe.
- What is more, they will not have to rely solely on the written word.
3. "Have to" in the future tense when questions consists of "will + pronouns + have to", examples:
- Why will they have to leave?
- How long will I have to take this medication?
- When will she have to be there?
Use "have to" in the past tense
1. "Have to" in the past tense turns from "have to" to "had to", examples:
- We had to walk all the way to the station.
- I had to get up early.
- I had to postpone my appointment.
- I had to run to catch up with Adam.
- She had to take care of her sister.
2. "Have to" in the past tense when negation consists of "did not + have to", examples:
- He did not have to pay his speeding fine because he pleaded diplomatic immunity.
- I did not have to gather strength.
- I did not have to convince her.
- It did not have to die itself and trust that it would be reincarnated in its descendants.
3. "Have to" in the past tense when questions consists of "did + pronouns + have to", examples:
- Why did you have to see the doctor?
- How much did he have to pay for tuition?
- Why did they have to leave?
Use of "have to" in the present tense
1. "Have to" in the present tense consists of "pronouns + have to", examples:
- I have to get up early.
- We have to correct these problems soon.
- You have to follow the rules.
- He has to have a lot of money.
- She has to be the most beautiful woman.
2. "Have to" in the present tense when negation consists of "don't or doesn't + have to", examples:
- You don't have to make excuses for her.
- Phew! I'm so glad I don't have to give that speech.
- That's only someone's personal opinion, and we don't have to write it into the document.
- She doesn't have to work at weekends.
- He doesn't have to exert himself on my behalf.
- Dad doesn't have to pay another penny to Josie.
3. "Have to" in the present tense when questions consists of "do or does + pronouns + have to", examples:
- Do I have to get up early?
- Do we have to correct these problems soon?
- Do you have to follow the rules?
- Does he have to have a lot of money?
- Does she have to be the most beautiful woman?