语法复习专题(5)Unit5 介词和连词一、考点聚焦 1、介词的分类与语法功能 (1)介词是虚词,不能单独作句子成分,必须与名词、代词(或相当于名词的其他词类、短语或从句等)构成介词短语,在句中充当一个成分。介词分为:简单介词,如at、in、for等;合成介词,如within、inside、onto、througout等;短语介词,如according to、out of、because of、by means of、in spite of、instead of等。双重介词,如from behind / above / under、until after等。分词介词,如considering、including、judging(from / by) 等。 常见的介词宾语:名词、代词、动名词、从句、不定式等。如:It is going to rain this afternoon according to the weather forecast.He quarrelled with her yesterday.He suc