יש ממחטות בתיק שלי, אבל אני לא מוצאת עכשיו אפילו ממחטה אחת.

יש is the Hebrew existential word meaning there is / there are.

So:

יש ממחטות בתיק שלי
= There are tissues in my bag

In context, Hebrew often uses יש where English might say I have:

יש לי ממחטות = I have tissues

But in this sentence, because we also have בתיק שלי (in my bag), the literal there are sense is very natural.

No. יש does not agree in number.

It stays the same whether the thing is singular or plural:

• יש ממחטה = There is a tissue
• יש ממחטות = There are tissues

This is different from English, where we change is to are.

Hebrew often leaves that idea unspoken.

So יש ממחטות can naturally mean:

• There are tissues
• There are some tissues

A bare plural noun in Hebrew often has that indefinite some feeling, especially after יש.

בתיק שלי breaks down like this:

• ב־ = in
• תיק = bag
• שלי = my / mine

So literally it is something like:

in bag of mine

In Hebrew, possessive expressions with של usually come after the noun:

• הספר שלי = my book
• התיק שלי = my bag

So בתיק שלי is a normal Hebrew word order.

Because the speaker is feminine.

In the present tense, Hebrew verbs agree with the subject in gender and number:

• אני מוצא = I find / I’m finding (said by a male)
• אני מוצאת = I find / I’m finding (said by a female)

English does not show this difference, but Hebrew does.

That’s a very common Hebrew pattern.

Literally, אני לא מוצאת is I am not finding or I don’t find, but in natural English the meaning is often:

I can’t find

In context, Hebrew often uses a simple negative present-tense verb where English prefers can’t.

So:

אני לא מוצאת עכשיו אפילו ממחטה אחת
naturally means
I can’t find even one tissue right now

Hebrew could also say:

אני לא יכולה למצוא... = I can’t manage to find... / I’m unable to find...

But אני לא מוצאת is very natural for a situation where someone is searching and failing to locate something.

Because את marks a definite direct object, and ממחטה אחת is indefinite.

Compare:

• אני מוצאת את הממחטה = I find the tissue
• אני לא מוצאת ממחטה אחת = I can’t find even one tissue

Here, ממחטה אחת means one tissue / even a single tissue, not the one tissue, so there is no את.

This is one of the most important uses of את in Hebrew:

• definite object → usually את
• indefinite object → no את

אפילו means even.

So:

אפילו ממחטה אחת
= even one tissue
= not even a single tissue

It adds emphasis: the speaker is saying that although there are tissues in the bag, she cannot find even one right now.

In Hebrew, the number one usually comes after the noun:

• ממחטה אחת = one tissue
• ספר אחד = one book

So the Hebrew order is:

noun + one

not

one + noun

That is normal Hebrew word order for one.

Because ממחטה is a feminine noun.

Hebrew numbers agree with the gender of the noun:

• feminine noun → אחת
• masculine noun → אחד

So:

• ממחטה אחת = one tissue
• ספר אחד = one book

Also, the plural ממחטות with ־ות is another clue that the noun is feminine.

Because the two parts are saying slightly different things:

• יש ממחטות בתיק שלי = There are tissues in my bag
  → general statement, plural

• אני לא מוצאת עכשיו אפילו ממחטה אחת = I can’t find even one tissue right now
  → emphasis on a single item, singular

This is very natural in both Hebrew and English:

• There are cookies in the box, but I can’t find even one cookie.

So the switch from plural to singular is not strange; it is exactly what gives the sentence its meaning.

Yes, Hebrew word order is fairly flexible, and עכשיו (now / right now) can move around.

In this sentence:

אני לא מוצאת עכשיו אפילו ממחטה אחת

עכשיו comes after the verb, which sounds very natural.

You could also hear:

• עכשיו אני לא מוצאת אפילו ממחטה אחת
• אני עכשיו לא מוצאת אפילו ממחטה אחת

But the version in your sentence is smooth and ordinary.

The placement affects emphasis a little:

• עכשיו earlier in the sentence can emphasize right now
• עכשיו after the verb sounds more neutral and conversational

This is because Hebrew verbs change shape quite a bit between forms.

The dictionary form is:

למצוא = to find

But the present tense forms are:

• מוצא = masculine singular
• מוצאת = feminine singular
• מוצאים = masculine plural
• מוצאות = feminine plural

This verb belongs to a common pattern where the present tense begins with מו־. So although למצוא and מוצאת do not look very similar at first, they are forms of the same verb.

This is something Hebrew learners get used to over time: you often learn a verb as a small family of forms, not just as one single shape.

Only the present-tense verb would change:

יש ממחטות בתיק שלי, אבל אני לא מוצא עכשיו אפילו ממחטה אחת.

The difference is:

• מוצאת = feminine speaker
• מוצא = masculine speaker

Everything else stays the same.