is (zero conditional).

will - tell (1st conditional).

if + past perfect, would have + past participle.

will - give (1st conditional).

wouldn't eat (2nd conditional).

to talk about imaginary or probable situations in the present or future + consequences.

would have called (3rd conditional).

'd known (3rd conditional).

To talk about imaginary and impossible situations in the past and their consequences. These situations are impossible, we can't change the past.

to talk about situation that are generally true or always true.

if + past simple, would + inf.

would look (2nd cond)

have (zero cond)