She lays a lot of emphasis on the usage of prepositions.她把重点放在介词的使用上.Prepositions and conjunctions are particles.介词和连词是小品词.The teacher asked us to fill in the blanks with prepositions.老师叫我们在空白处填入介词....
Complete the following sentences by filling the blanks with proper prepositions and adverbs.用适当的冠词和副词填空, 完成下列句子。Prepositions and conjunctions are particles.介词和连词是小品词.Many prepositions are used adverbially in English.在英语里...