How do you say he came by himself ?

Question

How do you say he came by himself

and I came by myself

and im always by myself

Answer 1

I would say

He came by himself-->Él vino solo

I came by myself-->Yo vine solo

I am always by myself-->Siempre estoy solo

The "yo" and "él" are not completely necessary but I would add them just so you can be sure.