1 . 阅读下面句子，写出下列句子结构
(S主语；V谓语；O宾语；C宾语补足语；IO间接宾语；DO直接宾语；P表语)。
1. Time flies.
2. He gave me an apple.
3. He is a teenager.
4. They found the house dirty.
5. There is a teacher in the lecture hall.