1 I'd like (to help homeless people).
我想幫助無家可歸的人.
不定式做賓語.
2.The girl could visit the sick kids in the hospital (to cheer them up).
這個女孩看望生病的孩子,讓他們開心起來.
不定式做目的狀語.
3.Mario believes it can help him (to get his future dream job).
馬里奧相信它能幫它獲得將來的理想工作.
不定式做賓語補足語.
4.It's very important (to keep healthy).
保持健康很重要.
不定式是真正的主語,it是形式主語.
5.Her job is (to look after the children).
她的工作是照看孩子們.
不定式是作表語.