The past tense of put a impediment in the way of is also put a impediment in the way of.
The third-person singular simple present indicative form of put a impediment in the way of is puts a impediment in the way of.
The present participle of put a impediment in the way of is putting a impediment in the way of.
The past participle of put a impediment in the way of is put a impediment in the way of.