Given the task definition, example input & output, solve the new input case.
In this task, you will be shown a correct English sentence. You need to generate an incorrect form of the input sentence.
Example: Students shouldn't work multiple full-time jobs.
Output: Student's shouldn't work many full-time jobs.
The possessive form is not correct in this instance and many should be multiple.

New input case for you: We do n't usually study these subjects very deeply . 
Output:
We do n't usually study these subject very deaply . 