Convert the given sentence into a complex sentence.
a. She was too full for another meal.
b. She was so__________________.

Hint: The given sentence is a simple sentence and is hinted to be converted into a complex sentence.

Complete step-by-step answer:

The answer to the given question is:
“She was so full that she could not have another meal.”
Too..(an adjective)..to = clause + so..(the adjective)..that + clause.
The sentence can be broken into two parts - Cause and Effect. The use of so...that in a sentence expresses cause and effect. In the given sentence: She was too full for another meal if we break it;
Cause - She was too full.
Effect - She could not have another meal.
She was so full that she could not have another meal.
full - adjective.
A simple sentence that contains the adverb ‘too’ can be converted into a complex sentence using ‘so…that’ and there will be no change in the meaning. The simple sentence is converted into a complex sentence by expanding the phrase into a subordinate clause – noun clause, adjective clause, and adverb clause.
The connector ‘so…that’ requires the modal ‘could’ in the given sentence.
Another example is:
The tea was too hot to drink.
The tea was so hot that I could not drink it.

Note: If the sentence consisting of ‘too…to’ is in positive or affirmative form, then the sentence consisting of ‘so…that’ will be in negative form.