-are --> -ato

-ere --> -uto

-ire --> -ito

to ask for

past participle --> chiesto

to close

past participle --> chiuso

to run

past participle --> corso

to decide

past participle --> deciso

to paint

past participle --> dipinto

to read

past participle --> letto

to put, place

past participle --> messo

to lose

past participle --> perso

to take

past participle --> preso

to answer, reply

past participle --> risposto

to write

past participle --> scritto

to see

past participle --> visto or veduto

to drink

past participle --> bevuto

to do, to make

past participle --> fatto

to open

past participle --> aperto

to say, to tell

past participle --> detto

to offer

past participle --> offerto

stare - stato

uscire - uscito

partire - partito

essere - stato

rimanere - rimasto

morire - morto

andare - andato

nascere - nato

diventare - diventato

arrivare - arrivato

venire - venuto

entrare - entrato

tornare - tornato

to know in the sense of to be acquainted with someone or something. It can also mean to meet, make the acquaintance of. 

present:

conosco

conosci

conosce

conosciamo

conoscete

conoscono

past participle --> conosciuto

to know a fact, to have knowledge of something, or to find out something. When followed by an infinitive, it means to know how to do something.

present:

so

sai

sa

sappiamo

sapete

sanno

past participle --> saputo

to go

past participle --> andato

to arrive

past participle --> arrivato

to become

past participle --> diventato

to enter

past participle --> entrato

to be

past participle --> stato

to die

past participle --> morto

to be born

past participle --> nato

to leave, depart

past participle --> partito

to remain

past participle --> rimasto

to stay

past participle --> stato

to go out, to exit

past participle --> uscito

to come

past participle --> venuto