Write the past forms of the verbs.swim _________skate ________have _________is ________skip _______see _________ski _________see __________ski _________are _________jump _______go _______travel ________rain________

swim-swamskate-skatedhave-hadis-wasskip-skippedsee-sawski-skiedare-werejump-jumpedgo-wenttravel-traveledrain- вот тут уже я точно не знаю, либо Was raining, либо rained.Но второе нигде и никогда,практически, я не слышала и не употребляла, а первое- не Past simple, а Past Continious. 

swim-swam skate-skated have-had is-was skip-skapt see-saw ski-? are-were jump-jumped go-went travel-traveled rain-rained