1. They left the house in a frightful mess.
    他们离去时房子里乱七八糟.

2. He looked pale and his clothes were in a frightful state.
    他看上去脸色苍白，浑身衣服脏乱不堪。

3. He looked pale and his clothes were in a frightful state.
    他面色苍白，衣服也搞得不成样子。