Read the sentences and answer the questions. Active Someone cleans the streets every day. Sir Christopher Wren designed St Paul’s Cathedral. a) What tense is used in each sentence? b) Underline the subject and object in each sentence. Passive The streets are cleaned every day. St Paul’s Cathedral was designed by Sir Christopher Wren. c) What has happened to the subject and object? d) How do we form the passive? e) When do we use the passive? f) When do we and don’t we use ‘by’?

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