If you want to ask permission to do something, start your question with modal verbs May, Can or Could.(यदि...

We use “Must” when we want to express that something/ an action is necessary.Or The modal verb “Must”...

जब हमें कोई कार्य करने की जरूरत या आवश्यकता...

अपनी ख़ुशी ज़ाहिर करने के लिए आप इन शब्दों...

Modal verbs “Will and Shall” are used to indicate a promise/ certainty that something will happen.अर्थात्...