Betty is often seen ( B.to help ) the old man with his housework.
贝蒂经常被见到帮那位老人做家务.
see sb do sth,看见某人做了某事.变为被动语态以后,原来的动词原形do之前要加上不定式的to,即be seen to do sth,被看见做了某事.所以这里是be seen to help.
Betty is often seen ( B.to help ) the old man with his housework.
贝蒂经常被见到帮那位老人做家务.
see sb do sth,看见某人做了某事.变为被动语态以后,原来的动词原形do之前要加上不定式的to,即be seen to do sth,被看见做了某事.所以这里是be seen to help.