wouldn't eat (2nd conditional).

is (zero conditional).

had gone (3rd conditional).

have (zero cond)

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

'd known (3rd conditional).

if + past perfect, would have + past participle.

would get (2nd conditional).

if + past simple, would + inf.

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

would look (2nd cond)

will - give (1st conditional).

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