The past tense of take one's life in one's hands is took one's life in one's hands.

The third-person singular simple present indicative form of take one's life in one's hands is takes one's life in one's hands.

The present participle of take one's life in one's hands is taking one's life in one's hands.

The past participle of take one's life in one's hands is taken one's life in one's hands.