Question

write the plurals to the following 1.wife 2.gas 3.sheep

Answer 1

1.wives 2.gases 3.sheeps

Answer 2

The plural of "wife" is "wives." The Germanic origin of the word is part of why it has an irregular plural.
The plural of "gas" is most commonly "gases."

The plural of "sheep" is also "sheep." Also from a German word.