介词是一种用来表示词与词,词与句之间的关系的词。在句中不能单独作句子成分。介词和其它代词或名词或词组搭配形成介词短语。口语上简称“介短”。介词后面一般有名词、代词或相当于名词的其他词类,短语或从句作它的宾语。介词与它的宾语构成介词短语,在句中作状语,表语,补语,定语或介词宾语。通过初中阶段的英语学习,相信同学们对介词短语有了一定的积累,但由于在课堂上,大家都是在语境中零散的遇到它们,很少有机会 Prepositions are words used to represent the relationship between words and words, words and sentences. Can not be used alone as a sentence in sentences. Prepositions and other pronouns or nouns or phrases form a prepositional phrase. Oral abbreviation “short”. After the preposition generally nouns, pronouns or other parts of the equivalent of nouns, phrases or clauses for its object. Prepositions and their objects form prepositional phrases, in the sentence as adverbial, epigraph, complement, attribute or prepositional object. Through junior high school English learning, I believe students have a certain accumulation of prepositional phrases, but because in the classroom, everyone is in the context of fragmented encounter them, there is very little chance