Dependent Clause or Prepositional Phrase?

Before I say anything else, I need to know that you're listening.

• dependent clause

• prepositional phrase

Mr. Cavendish has the unfortunate habit of leaving everything off until the very last minute.

• dependent clause

• prepositional phrase

Through the schoolyard, the young children happily dashed.

• dependent clause

• prepositional phrase

I sincerely doubt we will see people living on Mars during my lifetime.

• dependent clause

• prepositional phrase

Sally and Tom can move into the house after all the bank contracts have been signed.

• dependent clause

• prepositional phrase

Since everyone finished the test early, Dr. Palmer dismissed her students a few minutes early.

• dependent clause

• prepositional phrase

Between you and me, this is the worst pie I've ever tasted!

• dependent clause

• prepositional phrase

Loyal customers of the popular retail chain became angry when their rewards cards were invalidated unexpectedly.

• dependent clause

• prepositional phrase

Why she said that, I'll never know.

• dependent clause

• prepositional phrase

Our wi-fi connection has been spotty since the recent storms.

• dependent clause

• prepositional phrase