Desire (want to ~)

② Nepali grammar rules

1. -न + चाहनु

Use म जान चाहन्छु (I want to go) / उहाँ जान चाहनुहुन्छ (he/she wants to go, respectful).
The desired action is a -न infinitive; चाहनु agrees with the subject who wants it.
Do not mix patterns as मलाई जान चाहन्छु (incorrect construction; use म जान चाहन्छु for wanting to go).

2. Desire with मन लाग्नु (to feel like doing)

मलाई जान मन लाग्छ (I feel like going) expresses feeling like going.
The experiencer is मलाई and the predicate लाग्छ.
Its meaning overlaps with म जान चाहन्छु (I want to go), but its case and verb construction differ.

3. मन पर्नु (to like; to find pleasing) and liking

मलाई चिया मन पर्छ (I like tea) expresses liking tea. मलाई चिया खान मन पर्छ (I like/want to drink tea, depending on context) can describe liking/wanting the action, depending on context.
A present urge can be made explicit with अहिले…मन लागेको छ (right now, feel like doing…).

4. Negating desire

Compare म जान चाहन्नँ (I do not want to go) with मलाई जान मन लाग्दैन (I do not feel like going).
One negates चाहनु, the other लाग्नु.
Preserve each construction's experiencer/subject marking when forming the negative.

5. Desire, need and ability

जान चाहन्छु (I want to go), जानु पर्छ (need to go) and जान सक्छु (I can go) express desire, necessity and ability.
Even the preceding form differs, जान/जानु; they are not one universal pattern with a freely replaceable final word.

A reference table for comparing personal forms

Distinguish मन पर्छ (like; find pleasing) from मन छ and मन लाग्छ (feel like doing).