这个英语句子怎么划分成分？
His friend and guide helped a lot and gave him some green tablets.
这句话的主语为His friend and guide,谓语动词为helped和gave,(由and并列的谓语动词，要看仔细哦)，又因为give sb. sth.所以 him 为gave的宾语，some green tables为宾补。
Optimism makes both you and others feel pleased.
这句话的主语为optimism, 又固定搭配 make sb. do sth.所以make为谓语动词，feel为动词原形，又feel为系动词，所以pleased为表语。
At first Robert wouldn’t let his daughter-go driving, but he gave up in the end.
这前半句话的主语为Robert，谓语动词为wouldn't let,宾语his daughter,宾补go driving，at first为时间状语。后半句话主语he，谓语gave up，状语in the end.
on the train he made use of his time and started to read his favorite books.
主语he，谓语made use of 和started，宾语read his favorite books.
i was excited because i would compete in the 100-meter dash.
主语i，系动词was，表语excited
后半句主语i,谓语would compete，宾语in the 100-meter dash.
four years later,she graduated.
主语she，谓语graduated，时间状语four years later.
