être – to be

présent de l’indicatif – present tense

je suis – I am nous sommes – we are
tu es – you are vous êtes – you are
il/elle est – he/she is ils/elles sont – they are

Je suis en train de parler.

I am (in the process of) speaking (right now).

imparfait de l’indicatif – imperfect tense

a descriptive past tense which indicates an ongoing state of being or a repeated or incomplete action

j’étais – I was nous étions – we were
tu étais – you were vous étiez – you were
il/elle était – he/she was ils/elles étaient – they were

Tu étais formidable, j’étais fort minable

You were great, I was very shabby

passé simple – preterite tense

used only in formal writing

je fus – I was nous fûmes – we were
tu fus – you were vous fûtes – you were
il/elle fut – he/she was ils/elles furent – they were

Je partis après que vous fûtes tombé.

I left after you were out.

futur – future tense

talks about upcoming events, what will be done

je serai – I will nous serons – we will
tu seras – you will vous serez – you will
il/elle sera – he/she will ils/elles seront – they will

garçons seront des garçons

boys will be boys

conditionnel – conditional tense

indicates an event that may or may not occur, usually dependent on certain conditions and used in a si clause

je serais – I would nous serions – we would
tu serais – you would vous seriez – you would
il/elle seraat – he/she would ils/elles seraient – they would

Je me demandais si tu serais disponible.

I was wondering if you would be available.

présent du subjonctif – present subjunctive

indicates subjective actions, nearly always found in dependent clauses introduced by que

je sois – I am nous soyons – we are
tu sois – you are vous soyez – you are
il/elle soit – he/she is ils/elles soient – they are

Oh! qui que vous soyez, jeunne ou vieux, riche ou sage … Victor Hugo

Oh! whoever you are, young or old, rich or wise … Victor Hugo

imparfait du subjonctif – imperfect subjunctive

used in formal writing in a subordinate clause when the main clause is in the past

je fusse – I was nous fussions – we were
tu fusses – you were vous fussiez – you were
il/elle fût – he/she was ils/elles fussent – they were

Et le dernier, de faire partout des dénombrements si entiers et des revues si générales, que je fusse assuré de ne rien omettre. –Descartes, Discours de la Méthode

And last, to all enumerations so complete and reviews so general, that I was assured that nothing is omitted. –Descartes, Discourse on the Method