In this task, you will be shown a correct English sentence. You need to generate an incorrect form of the input sentence.
One example: Students shouldn't work multiple full-time jobs.
Solution is here: Student's shouldn't work many full-time jobs.
Explanation: The possessive form is not correct in this instance and many should be multiple.

Now, solve this: For example , they can read again , if they want , back to the page that they cannot understand , or they are impressed by . 
Solution:
For example , they can read again if they want , and back to the page that they can not understand or they are impressed . 