Always

Typical mistakes: 

Always I ask myself what I am doing here. 

Never I find the answers. 

'Always' does not normally at the beginning of a sentence.' It's usually put with the verb, in same position as other frequency adverb. 'Never' goes in the same place. 

I always ask myself what I'm doing here. I never find the answer. 

But note that 'always' can be put at the beginning of imperative sentences. 

Always put on your safety belt when you drive. 

When 'always' mean 'all through the past until now', it is usually used with a present perfect tense. 

I've always believed he was innocent. 

You've always been my closest friend.