sit的过去进行时，do的一般过去时，read的过去进行时，arrive的过去进行时，wait的过

sit的过去进行时，do的一般过去时，read的过去进行时，arrive的过去进行时，wait的过

sitting did reading arriving waiting saw

sit(was/were sitting) do(did)
read(was/were reading)
arrive(was/were arriving)
wait(waited)
see(saw)

过去进行时都是was加动词ing形式。两个一般过去式是did 和 saw。建议去网上找动词三种形式表，有时间就读一下

was(were) sitting
did
was(were)reading
was(were) arriving
saw

回楼主 sit的过去时是sat 过去分词是sitten 没有过去进行时
do-did read-read
arrive-arrived
wait -waited
see-saw

sit的过去进行时 was /were sitting ; 过去分词是 sat
do的一般过去时，did
read的过去进行时 was/were doing ;过去分词是 read
arrive的过去进行时 was / were arriving ，过去分词是arrived
wait的过去进行时was / were waiting ; 过去分词是waited
see的一般过去时 saw
楼主：你所说的过去进行时要用在句子中，是过去分词形式吧，已写出来了。