(
课件网) Conditional Sentences Structure : A conditional sentence is composed of 2 parts : If-clause + Main Clause Example : If it rains tomorrow, we will not come. If-clause Main Clause Conditional Sentences Types : There are 4 types of conditional sentences. They are classified according to their specific implications. Each type of conditional sentences uses different tenses to show the difference in their implications. Conditional Sentences Type 0 : Use : Talk about universal truth. Tense : Present tense in both clauses Example : If you heat water to 100°C, it boils. Present Tense Present Tense If you pour oil into water, it floats. Conditional Sentences Type 1 Use : Talk about a present or future probable case. Tense : If-clause ~ Present Tense Main Clause ~ Future Tense Example : If I feel sick, I will not go to school. Present Tense Future Tense If it rains tomorrow, the match will be cancelled. Exercise One If you _____ (not come), You _____ (miss ) the show. do not come will miss John _____ (buy)a car if he _____ (get)a job. will buy gets Mary _____(get) a toothache if she_____ (eat) too many sweets. gets eats Conditional Sentences Type 2 (Present Subjunctive) Use : Talk about a present or future improbable case. (A case that is unlikely to happen) Tense : If-clause ~ Past Tense Main Clause ~ would + an infinitive Example : If he were a bird, he would fly across the harbour. Past Tense Would + infinitive If I had $200,000 now, I would buy a car. Conditional Sentences Type 3 (Past Subjunctive) Use : Talk about a past, impossible case Tense : If-clause ~ Past Perfect Tense Main Clause ~ Would + Present Perfect Form Example : If I had had enough money, I would have bought the camera yesterday. Past Perfect Tense Would + Present Perfect Form If I had come home earlier, I would not have missed the programme. Exercise Two If I _____ (be) four years old, I _____ (learn) to play the piano. were would learn If I _____ (not fail) in the examination, my mother_____ (buy) me a new computer. had not failed would have bought 3. We _____ (finish) if we _____ (have) better preparation. would have finished had had Conditional Sentences Variations: Type 1 : If you see John, ask him to come and see me. Should you see John, ask him to come and see me. SHOULD may replace IF in type 1 Type 2 : If I were an aeroplane, I could fly in the sky. Were I an aeroplane, I could fly in the sky. COULD or MIGHT may replace WOULD WERE may replace IF in an inversion Conditional Sentences Type 3 : If I had come home earlier, I would not have missed the programme. Had I come home earlier, I would not have missed the programme. HAD may replace IF in an inversion Conditional Sentences Type 2 & Type 3 : If it were not for the rain, we would go to Shatin. (Type 2) But for the rain, we would go to Shatin. But for+ a noun may replace `If it were not for’ If it had not been for the traffic jam, we would have arrived on time. ... ...
