The particle ནས་ has several functions with respect to case and conjunction, but it is also used in forming the present gerundive of verbs (of whatever class), especially verbs of motion and stative verbs.

• གོམ་པ་བརྒྱབ་ནས་ཡོང་པ་ཡིན། “I came on foot (came walking).”
• རྟ་ཞོན་ནས་ཕྱིན་སོང་། “He went by horse (went riding a horse).”
• རྟ་རྒྱུག་ནས་མེ་མདའ་བརྒྱབ་དགོས་རེད། “You have to shoot as you gallop.”

The construction of the present gerundive with ནས་ is ambiguous, insofar as it can also be understood as a past gerundive, implying that the two actions are consecutive. Thus the last example may also be translated as “You have to shoot after you’ve galloped.” Only the context will reveal whether the tense is past or present.