For ease of reading, the form Rs is less confusing than rs. Example:
"Railroad crossing look out for cars. Can you spell it without any Rs?"
R's is the plural form of r, but Rs is acceptable although not the preferred form.
The plural of "Rs" can be either "Rs" or "rupees", depending on the context.
Rupees - Rs. (plural) Re. (Singular) Paise - p
ar is not a letter. R is a letter. The plural would be Rs.
The plural form of "do" is "do" and the plural form of "don't" is "don't." These words do not change in the plural form when used in a sentence.
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "I" is "we."
The plural form of "was" is "were."
The plural form of "is" is "are."
The plural form of mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.
"Groceries" is the plural form of "grocery."