The difference between the verbs "AVERE" "ESSERE" and "STARE"

3

You can find an almost comprehensive explanation in the question about Gerund. ;)
Here:
http://www.moltobenei...>
To sum it up:

"Avere" and "Essere", beside their standard use, are used as auxiliary verbs to form compound tenses and passive form tenses.

Simple tenses - Passive form => "Essere"

Compound tenses - Active form transitive verbs => "Avere"

Compound tenses - Passive form transitive verbs => "Essere"

Compound tenses - Reflexive verbs => "Essere"

Compound tenses - Verbs used in impersonal form => "Essere"

Compound tenses - Impersonal Verbs indicating weather => "Essere" [ More correct ] or "Avere"

Compound tenses - Intransitive verbs there isn't a rule. Many intransitive verbs use "Essere" as auxiliary verb, while many others use "Avere".

The modal verbs (i.e.: "volere", "potere", "dovere", etc. used as auxiliary verbs) tend to use both "essere" and "avere" as auxiliary verbs.

Note that certain expressions can be different from English:

"Ho fame" [ "Avere", not "Essere" ] = "I'm Hungry" [ "Be ]
"Ho sete" [ "Avere", not "Essere" ] = "I'm thirsty" [ "Be ]

And so on...

"Stare" is used to:

- Express health conditions (i.e.: sickness - "Essere" can be used too, but in different ways)

E.G.:
Sto male.
[ I feel bad ]

- Speak about posture (i.e.: to be sitting - "Essere" can be used too, but there are small differences)

E.G.:
Sto seduto.
[ I'm sitting ]

- Tell where you are (i.e.: I'm home - "Essere" can be used too)

E.G.:
Dove stai?
[ Where are you? ]

- Tell the usual position of an object (even if "essere" is used by people the same way).

E.G.:
Le forchette stanno nel primo cassetto
[ The forks are in first drawer. ]

- Emphasize sentences containing advises and orders or expressing certain moods.

E.G.:
Stai seduto!
[ Sit down! ]
Stai attento....
[ Be careful... ]
Sto in ansia...
[ I'm in anxiety - In this particular case, and few others, "Essere" can be used too ]

- Form the progressive tenses.

E.G.:
Sto andando a casa.
[ I'm going home ]

Hope this helps. ;)

3

Glad to help. ^_^

Just an addition:

For simple tenses in passive form "venire" can be used too.

E.G.:

"Ogni anno, vengono prodotti 25 milioni di tonnellate di rifiuti"

[ 25 million tons of waste are produced each year ]

0

Wow!!! Yes in deed this helped a great deal grazie dell'aiuto... :)