Choose the right form of verb:
It is high time you (take) responsibility for your actions.

• Correct sentence: It is high time you took responsibility for your actions.

• It is time/ It is high time
- It is time/ It is high time এরপর যদি subject থাকে তাহলে পরবর্তী verb টি past indefinite tense এ হয়।
- কোনো কিছু করার এখনই উপযুক্ত সময় অর্থে It is time/ It is high time ব্যবহৃত হয়।
- যেমন: It is high time you took responsibility for your actions.

• নিয়মানুযায়ী, প্রদত্ত বাক্যে It is high time এর পরে subject আছে, তাই এর পরে verb এর past form (took) বসবে।

• More examples:
- It is high time we left the place.
- It is high time he changed his bad habits.

• তবে, It is time/It is high time এরপর যদি subject না থাকে তবে to + verb হয়।
- যেমন: It is high time to stop corruption.

Source:
1. A Passage to the English Language by S M Zakir Hussain.
2. Advanced Learner's Communicative English Grammar and Composition by Chowdhury and Hossain.