What would happen — for hypotheticals, politeness, and advice.

• parlerei / parleresti / parlerebbeI/you/he would speak (parlare) — note -are changes a→e: parlare → parler-Parlerei con lui = I would speak with him
• parleremmo / parlereste / parlerebberowe/you-pl/they would speak (parlare) — noi -emmo (double m!), voi -este, loro -ebberoParleremmo volentieri = We would gladly speak
• prenderei / prenderesti / prenderebbeI/you/he would take (prendere) — -ere keeps the e: prendere → prender-Prenderei un caffè = I would take a coffee
• dormirei / dormiresti / dormirebbeI/you/he would sleep (dormire) — -ire keeps the i: dormire → dormir-Dormirei tutto il giorno = I would sleep all day
• a→e endings: parlerei (NOT parlarei)KEY POINT: -are verbs change the stem a→e before the conditional ending — like the future tensemangiare → mangerei = I would eat
• sarei / saresti / sarebbeI/you/he would be (essere) — irregular stem sar-Sarei felice = I would be happy
• saremmo / sareste / sarebberowe/you-pl/they would be (essere) — stem sar-Sarebbero contenti = They would be happy
• avrei / avresti / avrebbeI/you/he would have (avere) — irregular stem avr-Avrei bisogno di aiuto = I would need help
• avremmo / avreste / avrebberowe/you-pl/they would have (avere) — stem avr-Avrebbero tempo domani = They would have time tomorrow
• farei / faresti / farebbeI/you/he would do/make (fare) — irregular stem far-Farei volentieri = I would gladly do it
• andrei / andresti / andrebbeI/you/he would go (andare) — irregular stem andr-Andrei al mare = I would go to the sea
• potrei / potresti / potrebbeI/you/he could (potere) — irregular stem potr-Potrei sbagliarmi = I could be wrong
• vorrei / vorresti / vorrebbeI/you/he would want (volere) — irregular stem vorr- (double r)Vorrei un caffè = I would like a coffee
• dovrei / dovresti / dovrebbeI/you/he should / ought to (dovere) — irregular stem dovr-Dovrei studiare = I should study
• verrei / verresti / verrebbeI/you/he would come (venire) — irregular stem verr- (double r)Verrei con te = I would come with you
• vedrei / vedresti / vedrebbeI/you/he would see (vedere) — irregular stem vedr-Vedrei volentieri quel film = I would gladly see that film
• darei / daresti / darebbeI/you/he would give (dare) — irregular stem dar-Ti darei una mano = I would give you a hand
• saremmo / faremmo / avremmo (noi)we-form ends in -emmo with a DOUBLE m — don't confuse with future -emoFaremmo un viaggio = We would take a trip
• Vorrei... (polite request)USE: 'I would like...' — the polite way to ask for something instead of 'voglio'Vorrei un tavolo per due = I'd like a table for two
• Potresti...? (polite favour)USE: 'Could you...?' — softer than 'puoi' when asking a favourPotresti aiutarmi? = Could you help me?
• Dovresti... (advice)USE: 'You should...' — giving advice with dovere in the conditionalDovresti riposare = You should rest
• Mi piacerebbe + infinitoUSE: 'I would like to...' — conditional of piacere for a wish/desireMi piacerebbe viaggiare = I would like to travel