Learn Portuguese (Portugal): O suspeito não terá tido um bom álibi. - The suspect probably did not have a good alibi.

This sentence uses the Futuro Composto do Indicativo (Future Perfect). While it can describe actions completed in the future, its most common use in everyday Portuguese is to express an assumption, guess, or probability about a past event. Instead of saying the suspect 'did not have' an alibi as a strict fact, terá tido implies they 'probably did not have' or 'must not have had' one.

Why are there two forms of the verb ter right next to each other in terá tido?

The compound future tense is always formed with the future tense of the auxiliary verb ter (here, terá) followed by the past participle of the main action verb. Because the main action here is also ter (to have an alibi), you use its past participle, tido. Together, terá tido literally translates to 'will have had', but in this context expresses a strong assumption about the past.

Could I just use the word provavelmente and the normal past tense instead of this complex verb form?

Yes! You can easily say O suspeito provavelmente não teve um bom álibi. Both sentences mean the exact same thing and are widely used. Using the Future Perfect to express probability is just a very natural alternative that native speakers use frequently, especially in news reports, police contexts, or storytelling.

Why does the word álibi require an accent mark on the first letter?

In Portuguese, words ending in 'i' are normally stressed on the final syllable (like ali or javali). However, álibi is stressed on the third-to-last syllable. Words with this stress pattern are called esdrúxulas, and Portuguese spelling rules dictate that every single esdrúxula word must carry a written accent mark to show it breaks the default pronunciation rules.