The complete prepositional phrase in the sentence stated above is "in the door's key hole". As the name suggests, this type of phrase is introduced by prepositions which in this case is with the use of preposition "in". It answers the question "where" which refers to the location of the object it modifies.
What does the captain report about the battle to Duncan? He reports that Macbeth has fought bravely and has defeated the enemy. ... He orders them to order the execution of the present Thane of Cawdor and strip him of his title and present the title to Macbeth.
I do not know the answer very well
The bombs go BOOM
When somewhere flowers start to bloom
No idea if that’s good
