Adverbs.
No. Bilaterally is an adverb because it describes how something is done, and adverbs do not have plural form.
No, it is not an adverb. It is the past tense, plural or second person, for the verb to be (I was, you were, he/she/it was, we were, they were).
The word therefore is an adverb, not a noun, and has no plural. The plural "therefores" would only occur when referring to the word itself, as in "He uses too many therefores in his sentences."
No. Their is a plural possessive adjective (possessive for they). The homophone word "there" can be an adverb (done there rather than here).
The word "spoonfuls" is a noun, not an adverb or adjective. It refers to a unit of measurement to describe the amount of something that fits on a spoon.
No. Them is a plural personal pronoun (third person plural). It cannot be used as an adverb.
About is used as a preposition or adverb. It has no plural form.
No, it is a plural noun.One related adverb is prayerfully.
There is no plural for lonely! There is no plural for lonely because it is an adverb.
There is no plural form of the adjective or adverb "else."
Really is an adverb. It has no plural or singular form.
No. Bilaterally is an adverb because it describes how something is done, and adverbs do not have plural form.
No, it is not an adverb. Pleasures is a verb form or a plural noun.
No. The word students is a plural noun. It cannot be an adverb.
No, it is a plural noun.
No, it is not an adverb. the word displays is a verb form, or a plural noun.
No. Paintings is a plural noun. It cannot be used as an adverb.