Questions & Answers about לפני שאני מכבסת כביסה, אני בודקת אם יש מספיק מים.
Because the speaker is female.
In the present tense, Hebrew verbs usually show gender and number.
Here, אני means I, but the verb still changes depending on whether the speaker is male or female.
- אני מכבס = I wash / I do laundry (male speaker)
- אני מכבסת = I wash / I do laundry (female speaker)
And similarly:
- אני בודק = I check (male speaker)
- אני בודקת = I check (female speaker)
So this sentence is being said by a woman.