Please be aware that there is a big difference between "In the last two hours, I have studied my lessons" and "For the last two hours, I have studied my lessons." With "for," the meaning would have been that the speaker's studying of his lessons had taken place throughout the last two hours.
With "in," the meaning is that the speaker has studied his lessons for some interval of time within the broader interval of the last two hours. If the speaker had studied his lessons for only a few minutes an hour ago, the sentence "In the last two hours, I have studied my lessons" would still be true.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .