Combine the sentences replacing the adjective with a noun: 1. My sister was cheerful. This made me forget all my troubles.

2. The Mosque's foundations are strong. This stopped it from collapsing in the earthquake.

3. The crate is heavy. It slowed Ram's progress.

1. My sister's cheerfulness made me forget all my troubles.

2. The strength of the mosque's foundation stopped it from collapsing in the earthquake.

3. The weight of the crate slowed the Ram's progress or The Ram's progress was slowed by the weight of the crate.

Explanation:

In English language, a noun can be defined as a word used to refer to a person, place, animal, idea, feeling or thing. Thus, a noun is considered to be a naming word.

An adjective is one of the parts of speech in English language and it can be defined as a word that qualifies or describes a noun in a sentence. Some examples of an adjective are big, heavy, small, happy, tall, short, cheerful, strong, fat, rambunctious, etc.

In this exercise, you're required to combine the given sentences by replacing the adjective with a noun while ensuring that the sentence is logical and expresses a complete thought.

1. The adjective in the first sentence is "cheerful" and it can be changed into a noun as "cheerfulness."

2. The adjective in the first sentence is "strong" and it can be changed into a noun as "strength."

3. The adjective in the first sentence is "heavy" and it can be changed into a noun as "weight."