So far, you've used the indicative mood to talk about facts and reality. But conversations are full of maybes, wishes, and what-ifs. That's where the subjunctive mood comes in. It’s not a tense, but a way to express subjectivity—things like doubt, desire, emotion, or hypothetical situations. Think of it as the mood for unreality.

The present subjunctive expresses current or future wishes, doubts, recommendations, and possibilities. Common triggers include phrases like espero que (I hope that), quero que (I want that), and é importante que (it's important that).

To form it, you typically start with the eu form of the present indicative, drop the final -o, and add the opposite vowel ending. Verbs ending in -ar take an -e ending, while verbs ending in -er and -ir take an -a ending.

Let's see it in action:

• Quero que você **fale** baixo. (I want you to speak quietly.)
• É possível que eles **cheguem** amanhã. (It's possible that they will arrive tomorrow.)
• Minha mãe espera que eu **coma** tudo. (My mother hopes that I eat everything.)

The imperfect subjunctive deals with past hypotheticals, wishes, or conditions. It often shows up in sentences with se (if) or after verbs in the past tense, like queria que (I wanted that) or era importante que (it was important that).

Its formation is straightforward. Take the third-person plural (eles/elas) of the preterite tense, remove the -ram ending, and add the endings -sse, -sses, -sse, -ssemos, -sseis, -ssem.

Here are a couple of examples:

• Se eu **tivesse** mais tempo, eu leria mais livros. (If I had more time, I would read more books.)
• Ele pediu que nós **físsemos** o trabalho. (He asked that we do the work.)

The future subjunctive is less common in modern spoken Brazilian Portuguese but appears in legal texts and formal expressions, often after quando (when) or se (if) to talk about future possibilities.

This means "When you see João, tell him I called." It refers to a future event that is certain to happen, but the exact time is unknown.

Compound tenses combine an auxiliary verb (usually ter or haver) with a main verb in the past participle. They allow for more nuance in expressing time.

The most common compound tense is the pretérito perfeito composto do indicativo (present perfect indicative). It's formed with the present tense of ter + past participle. It describes an action that started in the past and continues up to the present.

• Eu **tenho trabalhado** muito ultimamente. (I have been working a lot lately.)

This is different from the simple preterite (Eu trabalhei), which describes a completed past action.

You can also form compound tenses in the subjunctive mood. The pretérito perfeito composto do subjuntivo (present perfect subjunctive) uses the present subjunctive of ter + past participle. It expresses doubt, hope, or emotion about a completed past action.

• Espero que você **tenha gostado** da festa. (I hope that you liked the party.)

The action of liking (or not liking) the party is over, but the hope is in the present. This tense is very useful for connecting past events to present feelings.