אני לא בטוחה שהוא יבוא לפגישה.

Because the speaker is female.

In Hebrew, adjectives often agree with the person they describe in gender and number. In this sentence, בטוחה means sure/certain and describes אני (I).

• אני לא בטוחה = said by a woman
• אני לא בטוח = said by a man

So if a male speaker said the same sentence, it would be:

אני לא בטוח שהוא יבוא לפגישה.

Because אני is the same word for I regardless of gender.

Hebrew personal pronouns in the first person do not change for gender:

• אני = I
• אנחנו = we

So Hebrew usually shows the speaker’s gender elsewhere in the sentence, often through:

• adjectives, as in בטוחה / בטוח
• past tense verbs
• participles

That is why בטוחה is important here: it tells you the speaker is female.

שהוא means that he.

It is made of:

• ש־ / ש = that
• הוא = he

So:

• אני לא בטוחה שהוא יבוא = I’m not sure that he will come

In natural English, that is often optional, but in Hebrew ש־ is very commonly used to introduce a clause like this.

יבוא is the future tense, third person masculine singular form of the verb לבוא (to come).

Breakdown:

• dictionary form: לבוא = to come
• future: הוא יבוא = he will come

Some other future forms of the same verb are:

• אני אבוא = I will come
• אתה תבוא = you (masc.) will come
• את תבואי = you (fem.) will come
• היא תבוא = she will come
• אנחנו נבוא = we will come

It is יבוא because the subject is הוא.

Because בא usually means comes / is coming / came depending on context, while יבוא clearly means will come.

In this sentence, the speaker is talking about a future event: whether he will come to the meeting. So Hebrew uses the future tense:

• הוא יבוא = he will come

If you said הוא בא, it would usually sound like:

• he is coming
• he comes
• sometimes, in conversation, he’s on his way / coming

But יבוא is the straightforward form for will come.

Because לא negates what comes after it.

Here the speaker is saying she is not sure:

• אני בטוחה = I am sure
• אני לא בטוחה = I am not sure

Hebrew usually places לא directly before the word or phrase being negated. In this sentence, it negates the adjective phrase בטוחה.

לפגישה means to the meeting / for the meeting, with the preposition ל־ attached to פגישה.

Breakdown:

• פגישה = meeting
• ל־ = to / for

So:

• לפגישה = to the meeting

In Hebrew, ל־ is very common after verbs of movement or attendance, especially in everyday speech.

You could also see:

• לפגישה הזאת = to this meeting
• לפגישה שלנו = to our meeting

As for אל, it also means to, but it is often less common in simple everyday phrasing here. לבוא לפגישה is the most natural standard expression for come to a meeting.

Yes, sometimes.

Hebrew often allows subject pronouns to be dropped when the verb or adjective already makes the meaning clear enough from context.

So a speaker might say:

• לא בטוחה שהוא יבוא לפגישה.

This is natural in conversation, especially when it is already obvious who is speaking.

However, including אני makes the sentence more explicit and is very normal too:

• אני לא בטוחה שהוא יבוא לפגישה.

It is an adjective.

Literally, the structure is something like:

• I not sure

Hebrew often uses adjective-based expressions where English uses to be + adjective.

So:

• אני בטוחה = I am sure
• אני לא בטוחה = I am not sure

Notice that there is no present-tense word for am/is/are in ordinary Hebrew present-tense sentences. Hebrew usually leaves it out.

It is not written, because in Hebrew the present tense normally does not use a separate word for am / is / are.

So:

• אני בטוחה literally looks like I sure
• but it means I am sure

This is completely normal Hebrew.

Compare:

• הוא עייף = he is tired
• היא שמחה = she is happy
• אנחנו מוכנים = we are ready

Hebrew simply omits the present-tense to be.

Yes. In natural English, that is an excellent translation.

Hebrew often uses ש־ where English might use:

• that
• if
• or no linking word at all, depending on style

So אני לא בטוחה שהוא יבוא לפגישה can be understood naturally as:

• I’m not sure that he’ll come to the meeting
• I’m not sure if he’ll come to the meeting

Both are good English renderings.

A natural pronunciation is approximately:

Ani lo betukha she-hu yavo la-pgisha.

A slightly more detailed guide:

• אני = ah-NEE
• לא = loh
• בטוחה = be-too-KHA
• שהוא = sheh-HOO
• יבוא = ya-VO
• לפגישה = la-pgi-SHA

A few notes:

• The kh / ch sound in בטוחה is the throaty Hebrew sound, like Bach or Scottish loch.
• פגישה begins with a consonant cluster: pgi-, which may feel unusual for English speakers.

Yes, but it means something slightly different.

• אני לא בטוחה שהוא יבוא לפגישה = I’m not sure he’ll come to the meeting
• אני לא חושבת שהוא יבוא לפגישה = I don’t think he’ll come to the meeting

The first sounds more cautious and uncertain. The second sounds more like your opinion or expectation is negative.

Also note gender again:

• female speaker: אני לא חושבת
• male speaker: אני לא חושב