Betty is often seen (to help) the old man with his housework.
贝蒂经常被人看见帮这位老人做家务.
see sb do,看见某人做某事.变成被动语态就是be seen to do,被人看见做某事.所以这里要填不定式.
Betty is often seen (to help) the old man with his housework.
贝蒂经常被人看见帮这位老人做家务.
see sb do,看见某人做某事.变成被动语态就是be seen to do,被人看见做某事.所以这里要填不定式.