teaching aims: 1. enable students to grasp the basic rules for attributive clauses—relative adverbs used to begin attributive clauses. 2. learn how to use the relative adverbs in context. teaching important and difficult points: how the relative adverbs are used teaching methods: task-based learning method and individual and pair work teaching procedures: step 1. revision and check-up fill in the blanks with “prep + relative porn”. 1. do you remember the day _________ we left you in charge? (on which)