Подчеркните и укажите, к какому классу принадлежат местоимения. 1)If life takes

Подчеркните и укажите, к какому классу принадлежат местоимения.
1)If life takes an unexpected turn, a person discovers often that he can only depend on himself.
2)This is all I can say on the subject.
3)We can offer someone to do something, but we shouldn't force anyone.
4)Neither side has a motive to compromise at the moment.
5)One should always be careful when he operates this machine-tool.