CONDITIONAL SENTENCES (OR IF CLAUSES) PROFESSOR ILÁZARO FIGUEIREDO NAZARIO TYPE 0 -  IT REFERS TO GENERAL TRUTHS, OR SCIENTIFIC FACTS. IF + SIMPLE PRESENT      &      SIMPLE PRESENT      (NEED TO/WANT TO + HAVE TO)  -   SITUAÇÃO REAL                        IF CLAUSE          THEN         MAIN SENTENCE MODEL: If you need a good result,                you have to study hard.                If Allan wants to pass the exam       he has to dedicate harder.   TYPE 1 IF + SIMPLE PRESENT      &      FUTURE (WILL) -  SITUAÇÃO PROVÁVEL (PODERÁ SE TORNAR REAL)                        IF CLAUSE         THEN          MAIN SENTENCE MODEL: If I find her address,                        I will send her an invitation.                If Allan studies harder,                    he’ll pass the exam.   TYPE 2 IF + SIMPLE PAST      &       CONDITIONAL SIMPLE (= WOULD + INFINITIVE)   -   SITUAÇÃO IRREAL / IMPROVÁVEL                        IF CLAUSE        THEN          MAIN SENTENCE MODEL:  If I found her address,                   I would send her an invitation.                 If Allan studied harder,                  he would pass the exam.   TYPE 3 – FOCUS ON THE PAST                      SUMMARIZING TYPE 0: SIMPLE PRESENT & SIMPLE PRESENT TUPE 1: SIMPLE PRESENT & SIMPLE FUTURE TYPE 2: SIMPE PAST & CONDITIONAL SIMPLE TYPE 3: PAST PERFECT & CONDITIONAL PERFECT     IF + PAST PERFECT   &  CONDITIONAL PERFECT (= WOULD + HAVE + PAST PARTICIPLE)   -   SITUAÇÃO  IMPOSSIVEL (A QUAL DEVERIA TER ACONTECIDO E NÃO ACONTECEU)                        IF CLAUSE         THEN        MAIN SENTENCE   MODEL: If I had found her address,            I would have sent her an invitation.                If Allan had studied harder,           he would have passed the exam.                 CASOS ESPECIAIS DE CONDITIOANAL SENTENCES (6 TIPOS) PROFESSOR ILÁZARO FIGUEIREDO NAZARIO   1. O verbo to be no passado tem a forma were para todas as pessoas quando aparece em orações condicionais.                IF CLAUSE            THEN          MAIN SENTENCE   MODEL: If I were you,                               I wouldn't go out tonight                If he were intelligent                   he would study harder   2. Quando se deseja expressar verdades universais ou leis naturais, os verbos das duas orações podem aparecer no presente simples.                IF CLAUSE             THEN         MAIN SENTENCE   MODEL: If you heat a metal,                     it expands   3. Pode-se usar o presente simples com o imperativo.                IF CLAUSE          THEN            MAIN SENTENCE   MODEL: If you have any problem,            call me.                If the phone rings,                       please answer it.   4. Quando na frase houver had ou were, pode-se omitir o if fazendo-se a inversão do verbo com o sujeito (para enfatizar a condição apresentada).                IF CLAUSE          THEN            MAIN SENTENCE                                     MAKING THE INVERSION OF THE VERB MODEL: If John had arrived early,            he would have seen the show.                  Had John arrived early, he would have seen the show.                If I were rich,                               I would buy her a present.                         Were I rich, I would buy her a present.   5. Unless (se não; a menos que) pode ser usado em lugar de if not.                IF CLAUSE            THEN           MAIN SENTENCE                                     CHANGING IF BY UNLESS MODEL: if you don't invite Bill,                  he  won't come to the party.                       Bill won't come to the party unless you invite him.   6. Observe como se emprega can, could em períodos compostos com orações condicionais:                IF CLAUSE             THEN          MAIN SENTENCE                                      MEANING OF CAN / COULD MODEL: If he gets that job,                 he can buy the house.                      (can = will be able to)             If he got that job,                  he could buy the house.                    (could - would be able to)