Question

something ______(is /missing) from the cupboard​

Answer 1

Answer:

something missing from the cupboard.

Answer 2

Explanation:

something (Indefinite pronoun) follows singular subject "is" so, The Answer will be "something is missing from the cupboard"

But if something is splited like ( some thing) it is not a indefinite pronoun,it becomes plural subject Then some is Plural verb follows,. Some thing are missing from the cupboard.

Hope it helps

something -is (singular verb)

some thing - are (Plural verb).