Yes, the noun 'understanding' is a count noun as a word for an informal agreement.
The plural form is understandings.
The noun 'understanding' is an uncountable noun as a word for the ability to comprehend or sympathy for others' feelings.
This use has no plural form.
There are two acceptable plurals - memorandums of understanding and memoranda of understanding.
The word crises is a plural word; it is the plural form of the word crisis.
There is no plural word for if.
The plural word for delay is delays.
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 is comedones
No it's a singular word. A plural word would be "have".
In Chinese, the plural form of the word "minute" is "分钟" (fēnzhōng).
There is no plural form for the word, countries. This word itself is a plural.
The plural for of the word planet is the word planets.
No, the plural of problem is problems.