It means, "...when I have..."
Tengo means 'i have' if you had the phrase 'Tengo un problema' that would mean in english, 'i have a problem'
I do not have
no, no tengo, translated to English means: no, I do not have it.
¿Que llevas cuando hace frío -- hace calor? What do you take with you when it's cold -- When it's hot? Literally: What you take when make cold -- make hot?
I have it.
when (he or she) decides to
I do not have.
It means i have new....
I have love
'I have it here.'
I have siblings.
It means "When I call you"