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Active Voice (主動式) VS Passive Voice (被動式) Example 1 doer receiver a. Joe makes a cake. (Active Voice) receiver Be doer b. A cake is made by Joe (Passive Voice) Changes made : Past participle 1. In a, the subject is the doer of the action. (動作執行人為主位) In b, the subject is the receiver of the action. (接受動作的人或 物為主位) 2. In b, the verb is changed into the passive form (Be + past participle). 3. In b, ‘by’ is added before the doer of the action. Example 2 simple present tense a. Wayne cleans the clothes. (active voice) Be Past participle b. The clothes are cleaned by Wayne. (passive voice) Example 3 simple past tense a. Andy ate the cake. (active voice) Be Past participle b. The cake was eaten by Andy. (passive voice) Example 4 future tense a. Nicky will do the housework. (active voice) Be Past participle b. The housework will be done by Nicky. (passive voice) present continuous tense Example 5 a. Rocky is washing the dishes. (active voice) Be Past participle b. The dishes are being washed by Rocky. (passive voice) Example 6 past continuous tense a. Cherry was using the computer. (active voice) Be Past participle b. The computer was being used by Cherry. (passive voice) Example 7 present perfect tense a. Jackie has written two compositions. (active voice) Be Past participle b. Two compositions have been written by Jackie. (passive voice) How to change the verb to be? Tense Verb to be Simple present tense is / am /are Simple past tense was / were Future tense will be Present continuous tense is / am / are being Past continuous tense was / were being Present perfect tense has been Modal verbs Verb to be can / should / must…etc can be / should be / must be….etc How to change negative sentences into passive voice: simple past tense Example 8 a. Cindy did not break the window. (active voice) past participle Be b. The window was not broken by Cindy. (passive voice) Example 9 future tense a. Amy will not buy the tickets. (active voice) Be past participle b. The tickets will not be bought by Amy. (passive voice) We use the passive voice when: 1. we don’t know who / what the doer is. Eg.: The rich man was killed. 2. the doer is obvious. Eg.: The driver was fined for speeding. 3. the doer is not important. Eg.: The rubbish is removed. END