The word 'appears' is singular.
Ex: Ethan and Lucy appear to be wearing the same colored shirt. <--- In this sentence, Ethan and Lucy are two people making it plural, however there is no 's' at the end of 'appears'. Add an 's' when what you are talking about is singular. (That is a general rule, there are some exceptions.)
's is a contraction of the verb "is" or "has" and is used with both singular and plural nouns. For example, "John's cat" (singular) and "The cats' toys" (plural).
No, Atlantis is a singular noun (a proper noun). It is the name of a place; the word place is singular.
The plural form of the singular noun notch is notches.
Yes, and they are exactly the same. Singular = Singular Plural = Plural
Buffalos
Shelves
Mitochondria
cargoes or cargos
sheep, it doesn't change.
The possessive form of the singular noun general is general's.Example: That appears to be a general's car.
Appears is the third person singular form of appear. Appears is used with he/she/it or a singular noun subject.The aircraft appears to have crashed near Whangarei.It appears that some money is missing.They appear to be lost.The doctors appear to know what they are doing.
The plural of activity of activities.