Learn Italian: Questi pantaloni sarebbero molto originali con quel modello. - These trousers would be very original with that design.

Sarebbero is the present conditional of essere (to be), meaning "they would be". It is irregular because its stem changes to sar-. To make the "they" form to match questi pantaloni, we add the standard conditional ending -ebbero.

Why do we use questi for "these" but quel for "that" instead of quello?

Questi is the regular masculine plural of questo (this). However, quello (that) changes its ending based on the noun that follows it, exactly like the word for "the" (il, lo, etc.). Because modello takes the article il, quello drops the -lo and becomes quel.

Why is the word for "original" spelled originali?

In Italian, adjectives that end in -e in the singular (like originale) change to -i in the plural. Because it describes questi pantaloni (a plural noun), we must use originali.

Since pantaloni is plural, why doesn't molto change to molti?