It is high time ...V-past tense

useful sentence patterns for suggestion form

1. I propose/suggest/recommend...+ subject+ bare infinitive

e.g. I suggest the school introduce some new games.

2. I (would) suggest+gerund

e.g I (would)suggest introducing some new games.

3. It would be sensible/advantageous/beneficial + to-infintive or if+past tense

e.g. It would be sensible to introduce some new games.
       It would be beneficial if we introduced some new games.

4. Subject+clearly has the responsibility + to-infinitive

e.g. Our school clearly has the responsibility to introduce new games.

5. It is (high/about) time + [subject + past tense]/[for+subject+to-infinitive]

e.g. It is high time our school introduced some new games for our students.

(reference: http://www.nani.com.tw/slearn/sleng/eng_d/Chapter04/Chapter04_5.htm)

6. Subject+ could/might consider +gerund

e.g. Our school might consider introducing some new games.

7. If possible, I do hope that +subject + verb+ object

e.g. If possible, I do hope that our school could introduce some new games.

8. Gerund + would be an excellent idea.

e.g. Introducing some new games would be an excellent idea.