The past tense of sir is sirred. See all forms of sir with easy examples.

The past tense of sipple is sippled. See all forms of sipple with easy examples.

The past tense of siphon is siphoned. See all forms of siphon with easy examples.

The past tense of sipe is siped. See all forms of sipe with easy examples.

The past tense of sip is sipped. See all forms of sip with easy examples.

The past tense of sinuate is sinuated. See all forms of sinuate with easy examples.

The past tense of sinter is sintered. See all forms of sinter with easy examples.

The past tense of sink is sank. See all forms of sink with easy examples.

The past tense of sinicize is sinicized. See all forms of sinicize with easy examples.

The past tense of sinicise is sinicised. See all forms of sinicise with easy examples.