אם לא תהיה עוד נזילה, נוכל להשתמש בכיור החדש מחר בבוקר.

Because נזילה is a feminine singular noun. In Hebrew, the future form of להיות agrees with the noun it refers to.

• תהיה נזילה = there will be a leak
• יהיה תיקון = there will be a repair

So תהיה is used here because נזילה is feminine.

Grammatically, תהיה is indeed the 3rd-person feminine singular future form of להיות, so by itself it can mean she will be. But in this sentence it is being used in an existential sense: there will be.

Hebrew often uses forms of להיות this way:

• יש נזילה = there is a leak
• הייתה נזילה = there was a leak
• תהיה נזילה = there will be a leak

So here תהיה does not refer to a female person. It means there will be.

Here עוד means another, any more, or additional.

So אם לא תהיה עוד נזילה means something like:

• if there isn’t another leak
• if there isn’t any more leaking

In everyday Hebrew, עוד is very common in this kind of sentence.

Yes. אם לא תהיה נזילה נוספת is also correct.

The difference is mostly in style:

• עוד נזילה = very common, everyday, natural
• נזילה נוספת = a bit more formal or explicit

Both mean another leak.

נוכל means we will be able to, and להשתמש means to use.

So נוכל להשתמש = we will be able to use

This emphasizes ability or possibility: if there is no more leaking, then using the sink becomes possible.

If you said נשתמש בכיור החדש, that would mean we will use the new sink, which sounds more direct and less focused on whether it is possible.

Because להשתמש is a verb that requires the preposition ב־ before the thing being used.

So Hebrew says:

• להשתמש בכיור = to use the sink
• להשתמש במחשב = to use the computer
• להשתמש במפתח = to use a key

This is just how the verb works, so it has to be learned together with the preposition.

Because when the prepositions ב־, ל־, or כ־ come before a noun with ה־ (the), they usually combine into one form.

So:

• ב + הכיור becomes בכיור
• ל + הבית becomes לבית
• כ + הילד becomes כילד

Even though the ה־ disappears in writing, the noun is still definite. That is why the adjective is also definite: החדש.

So בכיור החדש means in/with the new sink, specifically the new sink.

Because כיור is a masculine noun.

In Hebrew, adjectives agree with the noun in gender and number:

• כיור חדש = a new sink
• הכיור החדש = the new sink

If the noun were feminine, the adjective would also be feminine.

Because Hebrew verbs already show the subject.

נוכל by itself already means we will be able. So אנחנו is not necessary unless you want emphasis or contrast.

For example:

• נוכל להשתמש בכיור החדש = we will be able to use the new sink
• אנחנו נוכל להשתמש בכיור החדש = we will be able to use the new sink

The second version is more emphatic.

Yes, it can move. מחר בבוקר means tomorrow morning, and Hebrew is fairly flexible about where time expressions go.

All of these are natural:

• נוכל להשתמש בכיור החדש מחר בבוקר
• מחר בבוקר נוכל להשתמש בכיור החדש

The version in your sentence is neutral and very common.

אם means if, and לא means not.

Together, אם לא introduces a negative condition:

• אם לא תהיה עוד נזילה = if there is no further leak / if there isn’t another leak

It sets up the condition for the main clause:

• נוכל להשתמש בכיור החדש מחר בבוקר = we’ll be able to use the new sink tomorrow morning

So the whole sentence has the structure:

if X, then Y

The comma separates the if-clause from the main clause, just as in English:

• If there isn’t another leak, we’ll be able to use the new sink tomorrow morning.

In standard written Hebrew, this comma is normal and helps readability. In very informal writing, people sometimes omit commas, but the version with the comma is the standard one.