1) "We have to clean the area before the new assembly can be installed." >>>past? a) We had to clean the area before the new assembly can be installed b) We were allowed to clean the area before the new assembly can be installed c) We needed to clean the area before the new assembly can be installed d) We musted clean the area before the new assembly can be installed 2) She is allowed to enter the production area, but she needs to wear protective shoes. >>>past? a) She was allowed to enter the production area, but she needs to wear protective shoes. b) She was allow to enter the production area, but had to wearing protective shoes c) She needn't wear protective shoes 3) They are able to speak to the supplier at 2pm today.>>>past? a) They had to speak to the supplier at 2pm today. b) They were able to speak to the supplier at 2pm today c) They was able to speak to the supplier at 2pm today. d) They spoke already to the supplier at 2pm today. 4) All employers need to be able to carry the boxes alone without twisting.>>>past? a) All employers are able to carry the boxes alone without twisting.All employersAll employersAll employers b) Every employer must can carry the boxes alone without twisting.Dad had to carry the boxes alone! c) All empoyers were able to carry the boxes alone without twisting. 5) We may attend Zero Harm week but we need to be back for the factory tour at 13:00. >>>past? a) We had to attend Zero Harm week but we need to be back for the factory tour at 13:00. b) We maid attend Zero Harm week but we needed to be back for the factory tour at 13:00.We didn`t have to walk to the station alone! c) We could attend Zero Harm week but we needed to be back for the factory tour at 13:00.We were allowed to walk to the station alone! 6) He must do it! >>>past? a) He needed to do it. b) He had to do it. c) He could do it. d) We must did it. 7) You don't have to eat it.>>>past? a) You didn't have to eat it. b) You couldn't eat it! c) You were able to eat it. d) You didn't must eat it! 8) We can boost our productivity without sacrificing safety.>>>past? a) We had to boost our productivity without sacrificing safety. b) We won't be able to boost our productivity without sacrificing safety. c) We could boost our productivity without sacrificing safety. d) We could boosted our productivity without sacrificed safety. 9) They mustn`t take a present of a value of over €35.>>>past? a) They had to take a present of a value of over €35. b) The didn't have to take a present of a value of over €35 c) They weren't allowed to take a present of a value of over €35 d) They mustn't took a present of a value of over €35 10) We are able to find the cause of the problem. >>>past? (2 answers) a) We could find the cause of the problem b) We had to find the cause of the problem c) We should find the cause of the problem! d) We were able to find the cause of the problem.

Manufacturing Modals - SWITCH into the PAST tense

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