American Sign Language (ASL) is a language that is distinctly different from English. It contains all the fundamental features of a language such as rules for pronunciation, word order and complex grammar.
Every language employs different strategies to distinguish when a question versus a statement is being raised. For example, English speakers ask a question by raising the pitch of their voices whereas ASL users ask a question by raising their eyebrows, widening their eyes, and tilting their bodies forward.
In addition to individual differences in expression, ASL has regional variations in the rhythm of signing, form, and pronunciation.
If you would like to learn some ASL take a look at this video