teach,write,sit,look,dance,swin,put,read,say,watch,eat,talk,wa...答:原词-三单形式-现在分词-过去式 teach-teaches-teaching-taught write-writes-writing-wrote sit-sits-sitting-sit look-looks-looking-looked dance-dances-dancing-danced swim-swims-swimming-swam put-puts-putting-put read-reads-reading-read say-says-saying-said watch-watches-watching-watched ea...