What's the difference between questo e ridicolo and e ridicolo?
Are both forms acceptable or should I stick to the first one?

you mean "questo è ridicolo" and "è ridicolo" ?

your question is when you have to use the word "questo" ?

"this is ridiculous"

"it's ridiculous"

questo=this

That's pretty much what I was asking for

Thanks!

Medio owned ahahah

uhmmm another tricky one, at least for me;
penso che sia grande - I think it is big
Why not penso e grande?

This post was edited by Grigo on Oct 12 2014 08:57am

Look this:

http://en.wikipedia.org/wiki/Subjunctive_mood#Italian

Thanks, now I got some idea about that, still beginner level and everything's strange

Got 1 more question;
è il mio insegnante
why do I use il in that phrase?

Anyway you should write "è"

è = is
e = and

Look this:

http://italian.about.com/library/fare/blfare110a.htm