prepositions,phrasal prepositions.In this lecture, classification of prepositions,collocation of prepositions with adjectives,verbs and nouns were discussed,and then the usage of some commonly-used prepositions were dealt with. 十二、状语从句(Adverbial Clause) Adverbial clauses are those that perform the function of adverbial in a complex sentence. Semantically,this kind of clause can be subdivided into adverbial clauses of time,place, manner,cause,result,purpose,condition,and concession.In this lecture usage of different adverbial clauses were discussed and the contrast 1010 prepositions, phrasal prepositions. In this lecture, classification of prepositions, collocation of prepositions with adjectives, verbs and nouns were discussed, and then the usage of some commonly-used prepositions were dealt with. 十二、状语从句(Adverbial Clause) • Adverbial clauses are those that perform the function of adverbial in a complex sentence. Semantically, this kind of clause can be subdivided into adverbial clauses of time, place, manner, cause, result, purpose, condition, and concession. In this lecture usage of different adverbial clauses were discussed and the contrast