what difference between used to & to be used to? I would like to know what difference between the two following phrases:   I used to smoke when I was in United States. I'm used to living alone.   Is it correct to say "I'm used to live alone when I was teenager" Does it the same meaning?
I used to study at Cambridge School I used to study at Cambridge School.  I am used to studying at Cambridge School.  If the verb is continuous tense, it need to be added "verb to be" before used to?
How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators differ? What is the difference between == and ===?  How exactly does the loosely == comparison work? How exactly does the strict === comparison work?  What would be some useful examples?