EXPANDING YOUR KNOWLEDGE / 23 When her daughter came to stay, she put flowers in the spare room. or She put flowers in the spare room when her daughter came to stay. Look at the following: This is the coat that I prefer. When ‘that’ is used in this way, it can sometimes be omitted without damaging the sentence: This is the coat I prefer. ‘That’ is ‘understood’ and does not need to be included. ‘And’, ‘but’ and ‘or’ are also conjunctions but they should not usually be used to start a sentence. Their place is between clauses and they join together main clauses: I waited for two hours but she did not come. He sat at the computer and wrote his article. ‘And’ can be used at the end of a list of main clauses. The radio was on, the baby was banging her spoon on the table, Peter was stamping on the floor and Susan was throwing pieces of paper out of the window. Using ‘and’, ‘but’ and ‘or’