Prepositions of Time - On
We use ‘on’ for days, dates and weekend (American English).
1a. (Right) I went running on Sunday morning.
1b. (Wrong) I went running in Sunday morning.
2. What did you do on the weekend (American English - on the weekend)?
1. On fire
= Being burned with flames.
OMG! His car is on fire!
2. On sale
=At a reduced price.
This watch is on sale for $50 only.
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