The parents demanded that the school _____ the students' breaktime immediately.

• Complete sentence: The parents demanded that the school increase the students' breaktime immediately.

• Present Subjunctive:
- চাওয়া বা ইচ্ছা প্রকাশ করতে sub-ordinate clause -এ verb এর Base form ব্যবহারের রীতিই হলো Present Subjunctive.
- সাধারণত advise, necessary, ask, command, recommend, demand, urge, propose, suggest, insist, prefer, request, require, ইত্যাদি verb গুলো ব্যবহৃত হলে এই নিয়ম প্রযোজ্য হবে।
- এক্ষেত্রে that যুক্ত subordinate clause এ সর্বদাই verb এর Base form হবে এবং Negative এর ক্ষেত্রে base form এর পূর্বে শুধু not বসবে।
- be verb থাকলে শুধু 'be' বসবে।

• Structure: Subject + verb (any tense) + that + subject + verb এর base form + extension.

• More examples:
- The citizens demanded that the mayor provide clean drinking water for all.
- He recommended that we watch the new movie this weekend.
- The parents demanded that the school take strict action against bullying.

Source:
1. A Passage to the English Language, S.M. Zakir Hussain.
2. English Wizard by Live Publications.