1. As orações condicionais referem-se a condições reais ou irreais.
if 2. As orações com if indicam as condições reais ou irreais e as orações principais expressam os resultados delas. Há três tipos básicos de orações condicionais:
First Conditional Simple Present if Simple Present Futurewill will infinitive to First Conditional: Descreve uma condição real ou provavelmente verdadeira. Nesse caso, usamos o Simple Present na oração com if e o Simple Present ou Future com will (will + infinitive sem to) na oração que expressa seu resultado. rains becomes If it rains in São Paulo, traffic becomes impossible. gets will buy If the weather gets colder, they will buy heavy coats. runswill catch If she runs, she will catch the bus.
Second Conditional Simple Past if would infinitive to Second Conditional: Descreve uma condição irreal ou improvável no presente ou futuro. Nesse caso, usamos o Simple Past na oração com if e o would + infinitive sem to na oração que expressa seu resultado. got would buy If the weather got colder, they would buy heavy coats. made would buy If he made more money, he would buy a house.
Third Conditional Past Perfect if would have Past Participle Third Conditional: Descreve uma condição irreal ou impossível no passado. Nesse caso, usamos o Past Perfect na oração com if e would have + Past Participle na oração que expressa seu resultado. had gotten would have bought If the weather had gotten colder, they would have bought heavy coats. had runwould have caught If he had run, he would have caught the bus.
unless if...not 3. A palavra unless significa a menos que ou a não ser que e substitui as palavras if...not unless The milk will spoil unless you keep it cold. = if not The milk will spoil if you do not keep it cold. unless if nt She will have an accident unless she drives carefully. = She will have na accident if she doesnt drive carefully.
were if 4. Usamos a palavra were para todas as palavras após if se o verbo for be. If were would If you were younger, I would accept your offer. would help if were They would help him if they were kinder
Were infinitive to 5. Were + infinitive com to pode substituir o Simple Past na oração com if. If dyed would look If I dyed my hair green, I would look very weird. = If were to dye would look If I were to dye my hair green, I would look very weird.
if shouldwere had 6. Podemos expressar condições sem if. Nesses casos usamos should, were ou had (+past participle) no início da oração.
First Conditionalshould infinitive to First Conditional: Usamos should + sujeito + infinitive sem to. Should see Should I see Fred. Ill give him your message. = If If I see Fred, Ill give him your message.
Second Conditionalwere Second Conditional: Usamos were + sujeito. Were hed travel Were he rich, hed travel a lot. = If were hed travel If he were rich, hed travel a lot.
Third Conditionalhadpast participle Third Conditional: Usamos had+ sujeito + past participle. Had bought wed have gotten Had we bought our tickets sooner, wed have gotten better seats. = If had bought wed have gotten If we had bought our tickets sonner, wed have gotten better seats.
ATENÇÃO ATENÇÃO: had would Não se esqueça que had e would têm a mesma contração. If Id know her address, Id have sent hera a letter. (had) (would)