Present Simple Hozirgi oddiy zamon quyidagi holatlarda ishlatiladi

7.Must have been doing-davomli ish harakat.

For.ex: He must have been waiting for 2 hours.(U ikki soatdan buyon kutayotgan bo’lsa kerak)

Passive voice

8.Must be done-qilinishi kerak.

For.ex: This work must be done at once.(Bu ish darhol bajarilishi kerak)

9.Must have been done-bajarilgan bo’lishi kerak. For.ex:

The work must have been finished yesterday.(Ish kecha tugatilgan bo’lishi kerak)

Must modal fe’lining sinonimilari

Have to(have got to) +V1 To be to+V1 To be supposed to + V1

1.to be to mustga qaraganda kuchliroq bo’lib, oldindan rejalashtirilgan bo’lib bajarilishi shart bo’lgan hollatlarda ishlatiladi.Present va Past zamon uchun ishlatiladi.

For.ex: Helen is to meet jane at the station.

Factory was to open in July.

2. a)Have to –biron bir vaziyatdan kelib chiqqan holatdagi majburlikni ifodalaydi.

For.ex: He has to be at office early.

b)Shuningdek have to biron bir qoidadan kelib chiqqan holdagi vaziyatni ham ifodalaydi

For.ex: You can’t turn right here, you have to turn left.