Do you know any websites that might help with the 6 troublesome verbs:

Question

sit-sat,lie-lay, rise-raise,...

Answer 1

http://grammar.ccc.commnet.edu/grammar/notorious2.htm
Scroll down and see the two charts for lie/lay and rise/raise.

http://grammar.quickanddirtytips.com/grammar-sit-vs-set.aspx
... for sit and set.