The available language tools seem very ineffective at catching real grammar errors. Am I missing something?

I have libreoffice on Mac OS X 10.11.3) I have enabled each of these extensions in Preferences->Language Settings->Writing Aids.
I have installed these extensions:
Language tool
Lightproof grammar checker
After the deadline
and each of them are enabled under Preferences(a mac OS X thing)->Language Settings->Writing Aids.

Am I missing some other setup step?

For example, None of the following is flagged as an error (or marked in need of revision)
This bad sentence has no period
Go there there.
This fragment ugly.
He fly moon.
She run tomorrow.
She jumping home.
Why would you end a question with a period.
I ran and he ran and she ran and they ran and we ran on and on.