In short

Modern Hebrew has no present-tense verb “to be” (you learned this as the zero copula of lesson 5: אני מורה, ani mora, “I am a teacher”). This lesson adds the two tools that fill the gaps that zero copula leaves. First, when you equate two definite things — “David is the teacher” — Hebrew slips a pronoun into the empty middle: דוד הוא המורה (David hu ha-more). This inserted pronoun is the pronominal copula, האוגד (ha-oged).

Second, for the past and the future — where the verb genuinely exists — Hebrew uses היה (haya, “was”) and its future/infinitive partner להיות (lihyot, “to be”): אתמול הייתי בבית (etmol hayiti ba-bayit, “yesterday I was at home”), מחר יהיה חם (machar yihye cham, “tomorrow it’ll be hot”). The same היה/יהיה also supplies the past and future of יש (yesh) and יש ל־ (yesh le-), where it agrees with the thing that exists or is owned. There is still no present form — the verb simply skips the present and reappears in the past and future.

The rule

Present “X is Y” with two definites → insert the pronominal copula. When both the subject and the predicate are definite noun phrases, place a pronoun between them that agrees with the subject: דוד הוא המורה (David hu ha-more, “David is the teacher”), רות היא הרופאה (Rut hi ha-rofa, “Ruth is the doctor”), ירושלים היא הבירה (Yerushalayim hi ha-bira, “Jerusalem is the capital”). Without the pronoun, דוד המורה would read as the phrase “David the teacher,” not a full sentence; the copula marks the equation and turns it into “David is the teacher.”

The copula agrees with the subject — הוא / היא / הם / הן. These are the third-person pronouns of lesson 1 doing a new job. A masculine singular subject takes הוא (hu), a feminine singular takes היא (hi), a masculine plural takes הם (hem), a feminine plural takes הן (hen) — regardless of the person of the subject. Even a first- or second-person subject uses a third-person copula: אני הוא האחראי (ani hu ha-achrai, “I am the one in charge”). Choose the pronoun by the subject’s gender and number, and never default to הוא.

Only with a definite predicate — never before “a ___”. The copula belongs to equative sentences (definite = definite). With an ordinary indefinite predicate you keep the plain zero copula of lesson 5: say אני סטודנט (ani student, “I am a student”), not אני הוא סטודנט. Inserting a copula there is an outright error.

Colloquial זה as an invariant copula. In speech Hebrew often links with זה (ze) instead of an agreeing pronoun, especially when the subject is an infinitive or an abstract idea: ללמוד עברית זה כיף (lilmod ivrit ze kef, “learning Hebrew is fun”), אהבה זה דבר יפה (ahava ze davar yafe, “love is a beautiful thing”). זה never changes for gender or number. Recognize it as everyday register; the agreeing pronoun is the neutral standard.

Past and future have a real verb: היה / להיות. The root is ה.י.ה, binyan pa’al. Where English says “was / were,” Hebrew conjugates the past הייתי / היית / היה / הייתה / היינו / היו (hayiti / hayita / haya / hayta / hayinu / hayu). Where English says “will be,” Hebrew uses the future אהיה / תהיה / יהיה / נהיה / יהיו (ehye / tihye / yihye / nihye / yihyu), and the infinitive is להיות (lihyot). Examples: הסרט היה טוב (ha-seret haya tov, “the movie was good”), אני רוצה להיות רופא (ani rotze lihyot rofe, “I want to be a doctor”).

There is no present form of the verb — do not invent one. היה covers only the past and the future. In the present the verb disappears and you fall back to the zero copula or the pronominal copula. There is no הווה used as “am/is/are,” and you never say אני היה for “I am.”

Past & future of יש / יש ל־ use היה, agreeing with the thing. The frozen present particles יש (yesh) and יש ל־ (yesh le-) from lessons 11 and 14 do not conjugate — but their past and future are built with היה/יהיה, and crucially that verb agrees with the possessed or existent noun, not with the possessor. היה לי כלב (haya li kelev, “I had a dog”), but היו לי חברים (hayu li chaverim, “I had friends”) — singular כלב takes היה, plural חברים takes היו. Likewise יהיה לנו זמן (yihye lanu zman, “we’ll have time”) and existential אתמול היה גשם (etmol haya geshem, “yesterday there was rain”).

Forms & patterns

The pronominal copula — pick it by the subject’s gender and number:

Past tense of היה (root ה.י.ה, pa’al):

Note that the masculine היית (hayita) and feminine היית (hayit) are spelled identically unvocalized; only pronunciation and context separate them.

Future tense and infinitive:

Existence and possession across the three tenses — the verb agrees with the existent/owned noun, not the person:

Examples

Common mistakes

• אני היה עייף -> אני עייף (ani ayef) - there is no present “to be”; היה is past only, so the present drops the verb entirely (lesson 5’s zero copula).
• אני הוא סטודנט -> אני סטודנט (ani student) - don’t insert a copula before an indefinite predicate; the pronominal copula appears only when the predicate is definite.
• רות הוא הרופאה -> רות היא הרופאה (Rut hi ha-rofa) - the copula agrees with the subject; a feminine subject takes היא, not הוא.
• מחר הווה חם / מחר יש חם -> מחר יהיה חם (machar yihye cham) - future “will be” is יהיה; there is no present *הווה, and יש is existence, not a state or the weather.
• היה לי חברים -> היו לי חברים (hayu li chaverim) - past “have” agrees with the possessed noun; the plural חברים needs the plural היו.
• הייתי חלב במקרר (meant “there was milk”) -> היה חלב במקרר (haya chalav ba-mekarer) - existential past uses היה agreeing with the thing (חלב, m. sg.), not a first-person form.
• אני רוצה היות רופא -> אני רוצה להיות רופא (ani rotze lihyot rofe) - after a modal you need the infinitive להיות, not a bare stem.

Tips

• English “is / are / am” in the present translates to nothing (lesson 5). היה steps in only for the past and the future.
• Insert the copula pronoun (הוא / היא / הם / הן) only when the predicate is definite — דוד הוא המורה. With a plain “a ___” predicate, leave it out: אני סטודנט.
• Match the copula to the subject: masculine → הוא, feminine → היא, masc. plural → הם, fem. plural → הן. Don’t reflexively reach for הוא.
• Learn the past by its shared stem היי־ (hayi-) plus endings, then memorize the three shapes that break it: haya (היה), hayta (הייתה) and hayu (היו).
• For “there was / will be” and “had / will have,” use היה / יהיה and make it agree with the thing that exists or is owned: singular היה / יהיה, plural היו / יהיו.
• The colloquial זה (ze) works as an all-purpose invariant copula, especially with an infinitive or an abstract subject: ללמוד עברית זה כיף (lilmod ivrit ze kef). It never changes for gender or number.
• After a modal (רוצה / צריך / יכול) use the infinitive להיות: אני רוצה להיות בבית (ani rotze lihyot ba-bayit).
• The future forms belong to the ל”ה (lamed-he) pattern — take them as vocabulary for now; the full paradigm comes in a later lesson.