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.

1) he - personal pronoun (личное); himself - Reflexive pronoun (возвратное);  2) This - demonstrative pronoun (указательное); I - personal pronoun (личное); 
3) We - personal pronoun (личное); someone, something, anyone - Indefinite Pronouns (неопределенные); 
4) Neither - indefinite pronoun (неопределенное);  5) One - indefinite pronoun (неопределенное); he - personal pronoun (личное); this - demonstrative pronoun (указательное)