In each group,choose the sentence that has correctly drawn a line between the complete subject and complete predicate for each of the following sentences.
The boy lost his lunch money.
is there a website to help with this?
Just about any sentence diagramming website (such as this one: http://members.cox.net/teachro/grammar/diagramming.htm ) can help with this. You would ignore the rest of the lines, such as for adjectives, phrases, etc., and focus on the line between the subject and verb.
In the sentence you included, which word is the verb? Once you find it, put a vertical line in front of it -- then you'll see that everything before the line is the complete subject and everything after the line is the complete predicate.
Let me know what you come up with.
=)
These sites explain complete subjects and complete predicates.
http://www.ucl.ac.uk/internet-grammar/function/subjpred.htm
http://jc-schools.net/ce/subjects-predicates1_files/frame.htm
http://ace.acadiau.ca/english/grammar/gsubpred.htm