Questions & Answers about קחי מטלית אחרת; המטלית הזאת כבר רטובה מדי.
Because קחי is the imperative form used when speaking to one female.
- קח = take! to one male
- קחי = take! to one female
- קחו = take! to more than one person
So this sentence is being said to a woman or girl.
Hebrew uses את only before a definite direct object.
Here, מטלית אחרת means another cloth, which is indefinite, so there is no את.
Compare:
- קחי מטלית אחרת = take another cloth
- קחי את המטלית = take the cloth
So the absence of את tells you the object is not specific/definite.