The past tense of co-fire is co-fired. See all forms of co-fire with easy examples.
The past tense of co-exist is co-existed. See all forms of co-exist with easy examples.
The past tense of co-educate is co-educated. See all forms of co-educate with easy examples.
The past tense of co-chair is co-chaired. See all forms of co-chair with easy examples.
The past tense of cnawvshawl is cnawvshawled. See all forms of cnawvshawl with easy examples.
The past tense of clutter is cluttered. See all forms of clutter with easy examples.
The past tense of clutch is clutched. See all forms of clutch with easy examples.
The past tense of clusterfuck is clusterfucked. See all forms of clusterfuck with easy examples.
The past tense of cluster is clustered. See all forms of cluster with easy examples.
The past tense of clunk is clunked. See all forms of clunk with easy examples.