Question

Sam -----(try) to change a light bulb when he ----(slip) and ---(fall) ​

Answer 1

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●was trying

●slipped

●fell

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Answer 2

Answer:

Sam was trying to change the light bulb when he slipped and fell.

Explanation:

Past tense implies that the action has been done long back and has been completed. It refers to any action done previously. Past tense has four forms – the simple past, the past continuous, the past perfect and the past perfect continuous form.  

Here the simple past tense has been used which implies that the action has been done and ended before only. Simple past tense uses the -ed morphemes usually. Thus simple past tense has been used here and the simple past tense of slip is slipped and fall is fell.