The oven has been turned off for an hour and thirty minutes.

Phrase: turned off for an hour and thirty minutes
Verb: had been
Subject:oven

The secretary and the accountant walked around and found the missing notebook in the trash can.
Verb: walked
Subject: secretary and accountant
Phrase: around and found the missing notebook
Please check my answers.

4 answers

Both are wrong.
What parts are wrong? Is it the phrases or the verbs?
I think that for sentence number 2, there might have been two verbs. The verbs are walked and found. If the double underlined walked and found, do I just cross out the word around and and?
1 and 2 The subjects are right.

Study this site very carefully to learn about prepositions and prepositional phrases.

http://www.chompchomp.com/terms/preposition.htm