You must listen to your teacher -I have not phoned her for ages,I must phone her Subject+must+not+Verb+O+P+T

Obligation
1.Must
2.Have to/has to,had to
Must
Subject+must+Verb+O+P+T
Must,Present va Future zamonlari uchun ishlatilib qilinishi kerak,shart,bu sening vazifang degan ma’noda ishlatiladi.
-You must listen to your teacher
-I have not phoned her for ages,I must phone her

Subject+must+not+Verb+O+P+T
Must not,qat’iy taqiqni bildiradi va qilmaslik shart deb tarjima qilinadi.
e.g You must not drive so fast
e.g I mustn’t leave my keys,otherwise I can’t get into
Attention:Must ning so’roq va o’tgan zamon shakli yo’q!
Have to/has to
Have to/has to Present va Future zamonlari uchun ishlatilib qilinishi kerak,shart,lozim deb tarjima qilinadi.
Subject+have/has to+Verb+O+P+T
e.g Tom has to do his job
e.g I have to learn English to get better job
Do/Does+Subject+have to+Verb+O+P+T?
(qilishim shartmi kerakmi,qilmasamchi)
e.g Does he have to finish this today?
e.g Do I have to tidy my room?
Subject+do/does+not+have to+V+O+P+T
Don’t have to/doesn’t have to qilishing shart emas,bunga ehtiyoj yo’q degan ma’noni anglatadi.
e.g His father is rich,he doesn’t have to study or work.
e.g You don’t have to clean the car because I have already washed it
Attention:will have to-possible but less usual

Attention:Must bilan have to ning darak gapdagi farqi Must bir kishini fikrini ifodalaydi ya’ni harakatni bajaruvchi shaxsning o’zi ish-xarakatni qilinishi kerak deb hisoblaydi,Have/has to da ish harakatni tashqi ta’sir natijasida qilishga to’g’ri keladi.
e.g I must write to Ann.I have not written to her for ages.
e.g Ann’s eyes are not very good.She has to wear glasses for reading.