What is have to / has to? How it different from have/ has ?
Have to / Has to :
They are semi-model auxiliary verbs . They show obligation, necessity and responsibility.
Have to = use with plural subject
Has to = use with singular subject
For example :
1: I have to take your class .
2: She has to learn the test.
3: You have to complete your work .
4: Ali has to go early.
5: They have to work at night .
6: He has to speak English.
7: We have to join the class.
Have / Has :
They are main verbs . They show possession and diseases.
Have = use with plural subject
Has= use with singular subject
For example:
1: She has a beautiful cat .
2: I have an English book .
3: He has a headache .
NOTE :
1: She has a beautiful cat . [ positive sentence ]
2: She does not have a beautiful cat .[ negative sentence ]
=> Has is only use in positive sentences with singular subject .
=> Have is used both positive and negative sentences . And also use with singular subject in negative sentences .
