must

Used to say that something is necessary or required, for example by a rule or a law.

• All passengers must wear a seat belt.
  Tüm yolcular emniyet kemeri takmak zorundadır.
• It's getting late, so I must go home.
  Geç oluyor, eve gitmeliyim.

Used to advise or invite someone strongly to do something.

• You must try this cake; it's delicious.
  Bu keki mutlaka denemelisin, çok lezzetli.
• You must come and visit us in the summer.
  Yazın mutlaka bize gelmelisin.

Used to say that you are almost sure that something is true.

• You must be tired after your long journey.
  Uzun yolculuktan sonra yorgun olmalısın.
• She must have forgotten about our meeting.
  Toplantımızı unutmuş olmalı.

Used in the negative form 'must not' or 'mustn't' to say that something is not allowed.

• You mustn't tell anyone about this.
  Bunu kimseye söylememelisin.
• Visitors must not touch the paintings.
  Ziyaretçilerin tablolara dokunması yasaktır.

Used in questions to show that you are annoyed by what someone does.

• Must you play that music so loudly?
  O müziği illa bu kadar yüksek sesle mi çalman lazım?
• Why must you always arrive late?
  Neden illa her seferinde geç gelmek zorundasın?

Used with say, admit or confess to make what you say stronger.

• I must say, the food here is excellent.
  Doğrusu, buradaki yemekler mükemmel.
• I must admit I was a little nervous.
  İtiraf etmeliyim ki biraz gergindim.