The abstract noun in the sentence is tomorrow, but here it is used as an adverb (when you go). Backpack and class are both concrete nouns, things you can physically sense. *The word "class" can be an abstract noun, when it refers to sophistication (e.g. high class) or when it is a taxonomic term (classification of living things).
yes
Is cheer an abstract noun or a concrete noun??????
No, backpack is a singular, common, concrete, compound noun.
Yes, the noun astonishment is an abstract noun, a word for an emotional reaction.
Is undergone an abstract noun
Concrete noun
The abstract noun is criticism.
The noun 'hopefulness' is an abstract noun, a word for an emotion.
The abstract noun is obligation.
Friendship has not abstract noun because It is a abstract noun
Abstract noun of hopeless