Question

he barely managed to say 'thank you' before she shut the door (split into two simple sentences)​

Answer 1

He barely managed to say 'thank you'. Then she shut the door.

Explanation:

• The sentence which has only one clause and one subject along with one predicate is known as a simple sentence.

• The simple sentence contains an independent clause it does not have a dependent clause.

• Independent clauses are the one that explains its meaning by itself.

• The dependent clause is the one that needs another clause to complete its idea.

Answer 2

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He barely managed to say 'thank you'. then she shut the door