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First conditional

VS

Second conditional

talk about things that are possible in the future

use for

things real

likely chance it will happen

estructure

if + present simple, will + verb

if i miss the bus, i will take a taxi

second conditional

First conditional

use for

estructure

unreal

imaginary situations in the present or the future

no an actual situation

if + past simple, would + verb

if they lost the game, they wouldn't go to the finals

less likely

unless it rains soon, the lake will dry up

without if

unless

if ...not or expecific if

as long as:

if and only if

as long as he finishes his homework, he ll join you at the skatepark

supposing (that)

supposing i can change my flight, i ll come a few days earlier!

if you don't clean the house, you'll sleep on the sofa

if i won the lottery, i'd move to japan