指出下列各句中动词不定式充当的句子成分Could you please give me something to eat?My dream is be a teach.I got up early to catch the train.I think we need to plan more trees.It's dangerous to swim in the river.

1 to eat 作something的定语，“你能给我一些吃的东西吗？”
2第二句错了， 应该是my dream is to be a teacher to be a teacher 做表语 “我的梦想是当一个老师”
3作目的状语， 我起的很早为了赶早班车
4作need的宾语，“我认为我们需要种更多树”
5作主语 ，it 是形式主语，to swim in the river 是真正的主语。“在河里游泳是危险的”

Could you please give me something to eat（定语）?
My dream is to be a teacher(表语）.
I got up early to catch the train（目的状语）.
I think we need to plan more trees（宾语）.
It's dangerous to swim in the river（真正主语）.
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1、Could you please give me something to eat?请问你能给我些吃的吗?不定式作something的定语.2、My dream is to be a teacher.我的梦想是当一名教师.不定式作表语.3、I got up early to catch the train.为了赶火...