The unusual depressive mood that Chisato had been experiencing lately(,) prevented her from going to school.
Do I need that comma? Why or why not? Or maybe it's optional?
The unusual depressive mood that Chisato had been experiencing lately(,) prevented her from going to school.
Do I need that comma? Why or why not? Or maybe it's optional?
The unusual depressive mood that Chisato had been experiencing lately, prevented her from going to school.
No, you don't need to put a comma before the verb "prevented".
"that Chisato had been experiencing lately" is a relative defining clause. This clause gives essential information about Chisato who is being referred to. You don't use a comma before and after the relative defining clause.
You don't use comma before and after a defining relative clause
. Consider this, "I don't know the problem that you are facing, but I promise I will help you".
Commented
May 25, 2017 at 9:03
Well, in fact, I'd use two instead of just one comma, and the sentence would be: 'The unusual depressive mood, that Chisato had been experiencing lately, prevented her from going to school.'
The 'that Chisato had been experiencing lately' part is non-essential, so you use enclosing commas.
Not using any commas is not an option, since it makes reading more difficult. You can understand the sentence anyway, but commas help you read and understand any text more easily.