הוא לא השאיר את הספר בבית בכוונה; הוא פשוט עשה את זה בטעות.

את marks a definite direct object in Hebrew. Since הספר means the book and is definite because of ה־, Hebrew adds את before it.

So:

• השאיר ספר = he left a book
• השאיר את הספר = he left the book

English does not have an equivalent word, so this is often confusing for learners at first.

השאיר is the past tense, 3rd person masculine singular form of the verb להשאיר, meaning to leave, to leave behind, or to keep depending on context.

In this sentence, it means he left behind.

Breakdown:

• dictionary form: להשאיר
• past: השאיר = he left / he left behind

This verb is from the Hif'il pattern, which often has a causative or transitive feel.

In Hebrew, לא is the normal word for not, and it usually comes before the verb.

So:

• הוא השאיר = he left
• הוא לא השאיר = he did not leave

This is more direct than English, where we usually need did not in the past. Hebrew does not need a helping verb here.

Grammatically, בבית literally means in the house or at home, depending on context.

In everyday Hebrew, בבית very often means at home. In this sentence, that is probably the most natural interpretation. But the same word can also literally refer to a specific house.

So the exact English wording depends on context, even though the Hebrew form stays the same.

בכוונה is a very common Hebrew adverb meaning intentionally, on purpose, or deliberately.

Literally, it comes from:

• כוונה = intention
• ב־ = in / with

So the sense is something like with intention.

It is one of the most common ways to say on purpose in spoken Hebrew.

בטעות means by mistake or accidentally.

Like בכוונה, it is built with the prefix ב־:

• טעות = mistake
• בטעות = by mistake

So the sentence contrasts:

• בכוונה = intentionally
• בטעות = by mistake

This is a very common pair in Hebrew.

Hebrew, like English, often avoids repetition by using a general phrase like did it.

So:

• הוא פשוט עשה את זה בטעות = he simply did it by mistake

Here, את זה refers back to the whole action of leaving the book at home.

This is natural and common in spoken Hebrew. Repeating the full verb phrase would sound heavier and less conversational.

Yes. עשה זאת is possible, but it sounds more formal or more written.

In everyday spoken Hebrew, עשה את זה is much more common.

So:

• עשה את זה = common, spoken, natural
• עשה זאת = more formal, more literary, more written

Hebrew often repeats the subject pronoun in a new clause, especially when the sentence is split into two clearly separate parts.

So:

• הוא לא השאיר...; הוא פשוט עשה...

This sounds natural and clear. English can also do this:

• He didn’t leave it on purpose; he just did it by mistake.

Hebrew could sometimes omit a repeated pronoun in certain contexts, but here repeating הוא is completely normal.

פשוט means simply or just here.

It softens the statement and makes it sound like:

• it was nothing deliberate
• it was only an accident
• there is no deeper explanation

So הוא פשוט עשה את זה בטעות means something like:

• he just did it by mistake
• he simply did it by accident

No, Hebrew word order is somewhat flexible, especially with adverbs and prepositional phrases. But the order in this sentence is natural.

Here, the structure is:

• השאיר את הספר בבית = left the book at home
• בכוונה = intentionally

So the sentence first gives the action and location, then adds the manner or intention.

A different order may be possible in some contexts, but בבית בכוונה sounds natural here and clearly means that the leaving was intentional.

Because להשאיר already contains that idea. In Hebrew, this verb can mean to leave, to leave behind, or to keep depending on context.

So English may need an extra word like behind, but Hebrew often does not.

For example:

• הוא השאיר את המפתחות בבית = he left the keys at home / he left the keys behind at home

The idea of failing to take something with you is often built into the verb itself.

Sometimes, yes, but it is not exactly the same.

• לא בכוונה = not on purpose
• בטעות = by mistake

They are close, but בטעות is stronger and more specific: it clearly says the action was accidental.

Compare:

• הוא עשה את זה לא בכוונה = he didn’t do it on purpose
• הוא עשה את זה בטעות = he did it by mistake

In this sentence, בטעות fits well because it directly contrasts with בכוונה.

The semicolon is mostly a punctuation choice. It shows a stronger pause between two closely related clauses:

• first clause: he didn’t leave the book at home on purpose
• second clause: he just did it by mistake

In everyday writing, many people might use a comma instead. The meaning would stay the same. The semicolon just makes the contrast a little clearer and more polished.