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They have built pacemakers, artificial joints, prosthetic limbs, polymer substances, and various other medical progressions. Less importantly, engineers have created cars, buildings, bridges, etc. In a sense, everything you see is either the direct product of an engineer or is made of the materials that an engineer produced.

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Q: What have engineers done in the past?
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How do you say it past tense safety training done for 2 new engineers?

You could say:The two new engineers received their safety training.The two new engineers carried out their safety training.The two new engineers did their safety training.


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The past tense of "does" or "do" would be "did" or "done", depending on the format of the sentence. Example: Present - Past I do - I did, I had done You do - You did, You had done She/he does - She/he did, S/he had done We do - We did, We had done They do - They did, They had done


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Past tense of do is did; past participle is done.


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The past participle of "do" is "done." The past participle of "have" is "had."


Is done a past tense word?

"Done" can be used as the past tense and past participle of "do." For example, "I have done my homework" (past participle) or "She did her chores yesterday" (past tense).


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Done is the past participle of do.


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The past tense of "do" is "did." "Have done" is the present perfect tense, which signifies an action that was completed at some point before now.


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"Did" is the past and "done" is the past participle.


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Who repairs leaking pipes?

This is done by plumbers or depending on the Pipe engineers.