Learn Hardcore Vietnamese: Tôi muốn viết lá thư cho An.

In Vietnamese, certain nouns can be paired with a classifier that matches their characteristics. Thư means "letter," and lá is often used for flat, paper-like objects (similar to how you might say "a sheet of paper"). Saying lá thư is a more natural and precise expression in Vietnamese.

Why is tôi used, and can it be omitted?

Tôi literally means "I," the first-person singular pronoun. In casual everyday speech, Vietnamese speakers sometimes drop the pronoun if the context is clear. However, as a learner, including tôi makes your meaning explicit and helps avoid confusion.

What does muốn mean here?

Muốn means "want" or "would like to." It conveys your desire or intention to do something—in this case, to write a letter.

Why do we say cho An instead of đến An?

In this context, cho can mean "for" or "to" and implies that the letter is directed/given to An. Using đến could imply a direction of movement (like "go to An"), which would sound odd when referring to writing a letter.

Can I just say viết thư without muốn?

You can say Tôi viết thư cho An to mean "I write a letter to An." But adding muốn indicates your intention or desire to do so. Without muốn, it sounds more like a statement of fact rather than an expression of wanting or planning to write.