By the way. In the explanation of the subjunctve i found:
"In less formal contexts we can use ordinary tenses instead of the subjunctive. Compare:
• They recommended that he should give up writing.
• They recommended that he give up writing, (more formal)
• They recommended that he gives up writing, (less formal)
Notice also:
• They recommended that he gave up writing. (= he gave it up)"

What is the difference in the bolt sentence? Why do we use ordinary past tence there?