as,since,because,becauseof的运用与区别.pptx

Read aloud.I’m sure something landed in the forest near the hills as I heard a loud noise last night.Since no one else saw these aliens, I refuse to believe you.原因as, since(既然) 可用来引导_______状语从句because原因状语从句最常用的引导词为________原因状语从句通常由because, since, as引导。because:表示直接理由，强调别人未知的事实，既可放在主句之前，也可放主句之后。as和since语气较弱，一般用来表示明显的原因。由as和since引导的原因状语从居多放在句首。because，since和as引导原因状语从句时，不能和 ______ 连用。soI’m sure something landed in the forest near the hills as I heard a loud noise last night.Since no one else saw these aliens, I refuse to believe you.原因状语从句常放在主句后面,也可放在主句的前面,用逗号隔开。The spaceship was damaged _____ a crash.A. because B. as C. since D. because ofbecause of 后面接名词,名词短语,人称代词的宾格;because 后接句子. 1. Tina woke up at midnight _____ a loud noise. A. because B. because of C. as D. since2. I will not tell you the rules_______ I have told you before. A. because B. because of C. until D. while用 because或because of 填空?1. They went to the forest ___________ their curiosity.?2. Tina woke up at midnight _________ a loud noise.?3. Tim didn’t go to school yesterday _________ he was ill.4. I’m unhappy ____________ your marks in the exam.because ofbecause ofbecausebecause of根据所给中文补全句子1.Li Ming didn’t go out for a walk because of _________________. (天下大雨)?2.Li Ming didn’t go out for a walk because___________________. (天下大雨)?3.Li Ming won’t go to the meeting because___________________. (他生病了)?4.Li Ming won’t go to the meeting because of __________________. (他生病了)the heavy rainit rained heavilyhe is illhis illnessPractise more!Page 105Write sentences about the story on page 99 using because of.Tina was surprised because of the yellow light in the sky.The aliens landed on this planet because of an accident.The children ran away from the forest because of the aliens.Their dad was not sure about the children’s story because of the writing on the piece of paper.《综合练习册》Page 113B. 2 because of her illness 3 because of last nights storm 4 because of a car accident 5 because of its hi