Past Perfect Simple Tenses

A)Read the sentences below. Then make them negative. 1) We had forgotten our passports, so we went home to get them. 2) He had travelled all over the world by his 30th birthday. 3) She had picked up her sister from school before she went shopping with her friends. 4) The class was silent because the headmaster had passed by. B) Based on the answers above, answer the following questions 1) In sentence 1, what happened first? 2) In sentence 2, what happened before his 30th birthday? 3) In sentence 3, what was she supposed to do before going shopping? 4) In sentence 4, why was the class noisy? Is the sentence below True or False?We use the Past Perfect Simple for an action or situation that finished before another action, situation or time in the past. True False