Ch 27 · Lesson 8

The future and conditional of probability

¿ ? The future guesses about now ( ), the conditional about the past ( ).

The short version

Future guesses the present, conditional the past

¿ ?

I wonder what time it is.
Why?

Where English scatters must, probably and I wonder, Spanish bends a whole tense to the job. ¿ ? asks what time it is now, not later. means he is probably at home. Shift the guess back in time and you shift to the conditional: , it was probably about three.

The four guesses on one screen

future: a guess about nowconditional: a guess about the pastWhat do the colours mean?
CertainThe guessEnglish
he/she is probably
he/she was probably
ha he/she must have arrived
he/she had probably arrived

The blue box is a future form, a guess about now. The dashed pink box is a conditional form, a guess about the past. The forms are the ones you know from the future and the conditional; here they stop telling time and start guessing.

You knowA guess
  1. Está en casa.he/she is at home
  2. Estará en casa.he/she is probably at home
  3. Quizás esté en casa.perhaps he/she is at home

The weakest step, ., takes the subjunctive: see the subjunctive of doubt.

The future: a guess about now

future: a guess about nowWhat do the colours mean?

Put a verb about the present into the future and the tense means "probably", "must" or "I wonder":

UseSpanishEnglish
the time¿ ?I wonder what time it is.
where .He/She is probably at work.
age .He/She must be about thirty.
the doorbell¿ ?Who can that be at this hour?
right now .They' probably having dinner.
Four alarm clocks in a row, with tick marks but no numbers: the first shows one o'clock, the second two o'clock, the third half past two and the fourth quarter to three. The hour hand is black and the minute hand red.
  1. .
  2. .
  3. .
  4. .

No numbers on the clocks, so every time is a guess: será la una (it must be one o'clock), serán las dos (it must be two), serán las dos y media (it must be half past two), serán las tres menos cuarto (it must be quarter to three).

The conditional: a guess about the past

future: a guess about nowconditional: a guess about the pastWhat do the colours mean?

Move the guess back in time and the future becomes the conditional:

  • serían las tres: it was probably about three (then)

  • serán las tres: it is probably about three (now)

Timeline from past to future, with now marked.

UseSpanishEnglish
the time .It was probably three when he/she arrived.
a state .She was probably tired.
age .He/She must have been about thirty then.
a crowd .There were probably about a hundred people.
no answer ; .He/She didn't answer; probably asleep.

Set the two side by side:

  • . - It's probably about three (now).
  • . - It was probably about three (then).

The conditional of probability loves a rough number with or : (about a hundred people).

Guess or real future?

future: a guess about nowconditional: a guess about the pastWhat do the colours mean?

The same form can be a guess or a real future. Ask what time the sentence is about:

Read asSpanishEnglish
a guess .He/She is probably at home now.
a real future .He/She will be at home tomorrow.
a guess .She was probably tired yesterday.
a real "would" , .With so much work, anyone would be tired.

With no time word, a future about something you cannot see right now is usually a guess: . . (He/She isn't answering. He/She is probably asleep.)

Going further: Finished actions: habrá llegado, habría salido and the rest of the guide, when you want them. This lesson does not need them.

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Lesson 8 of 28 in this chapter

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What do the colours mean?