Yes the word memory is a singular noun. The plural form is memories.
No, "memorys" is not a plural noun. The correct plural form of "memory" is "memories."
The word crises is a plural word; it is the plural form of the word crisis.
The irregular plural form of the noun memory is memories.
There is no plural word for if.
The plural form for the demonstrative pronoun this is these.
A non-plural word, a word (noun or pronoun) that is not plural is singular, a word for just one.
The plural word for delay is delays.
the plural word is comedones
No it's a singular word. A plural word would be "have".
The plural of the word "raisin" is "raisins."
The plural of the word "classification" is "classifications."