help please with this question

English
Tutor: None Selected Time limit: 1 Day

how do I change this sentence to passive 

Elementary school textbooks use this concept with frequency. 

and how do I change this one to also to passive 

writers should use passive constructions in certain situations. 

Nov 10th, 2014

1)  This concept is used frequently in elementary school textbooks.

2)  Certain situations require writers to use passive construction.

Nov 10th, 2014

Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.
Click to visit
The Notebank
...
Nov 10th, 2014
...
Nov 10th, 2014
Feb 23rd, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer