I would just like to know if I have correctly written the first sentence in which it is an attributive adjective sentence. And the second sentence in which it is a predicative adjective sentence, where the adjective used both attributively and predicatively in both sentences is 'enormous'?

1. The enormous pine tree fell on the Whitman’s home.
2. The tree that fell on the Whitman’s home was enormous.

Are these sentences correct?

Both are correct. :-)

Yes, both sentences are correct, and you have correctly identified the usage of the adjective "enormous" in each sentence.

In the first sentence, "The enormous pine tree fell on the Whitman’s home," it is an attributive adjective sentence. The adjective "enormous" directly modifies the noun "pine tree" and provides information about its size.

In the second sentence, "The tree that fell on the Whitman’s home was enormous," it is a predicative adjective sentence. Here, the adjective "enormous" follows the linking verb "was" and describes the subject "tree." It provides a characteristic or state of being for the subject.

To identify the usage of the adjective in each sentence, it's helpful to understand the difference between attributive and predicative adjectives. Attributive adjectives directly modify or describe a noun and are placed before the noun they modify. Predicative adjectives, on the other hand, follow a linking verb and describe the subject.

So, you have correctly applied the usage of "enormous" as an attributive adjective in the first sentence and as a predicative adjective in the second sentence. Well done!