Tenses

[goodox]

Hello everybody,

I have to build sentence in the present perfect simple or continuous. 

Why is your hair wet? Because it's raining and I don't using an umbrella. (present continuous) 
How I can say this sentence in present perfect? 
Example: Because it's up to now rained and I don't used an umbrella. Is that right?

[goodox]

Why is your hair wet? Because it's raining and I don't using an umbrella.

Normally I would say "used" and not "using". Because it's raining and I don't used an umbrella. But "used" is written in past. And this sentence will be not anymore in simpel present continuous. I'm confused here.  

[Duckduck (Contributor)]

Why is your hair wet? Because it's raining and I haven't been using an umbrella.

Normally I would say "used" and not "using". So far so good, but here you want to state that the direct result of not using an umbrella while it's raining is your wet hair. And to express exactly that you would have to use the Present Perfect.
But for the real problem please check below...      

Because it's raining and I don't used an umbrella. Please note that the Past Tense negation (Verneinung) needs an auxiliary (You got it, it's "do") and a full verb. BUT:
It's the auxiliary (Hilfsverb) that changes the tense, the full verb stays in the infinitive!!!
-> I didn't use an umbrella.
Questions work similarly:
-> Did you use an umbrella?
But statements are a different matter:
-> I used an umbrella in the shower yesterday. Didn't really work all that well...
But "used" is written in the Past Tense. And this sentence will not be in *simpel present (perfect) continuous anymore.
Now this is sweet and for a second I was confused, too. A sentence can either be in Present Perfect Simple: 
-> I haven't used an umbrella
or in Present Perfect Continuous:
-> I haven't been using an umbrella.

I'm confused here.  

Grüße
Duckduck

[goodox]

Thank you.