Here's a link that pretty much describes what he was saying. It puts it much more eloquently than I ever could. http://encyclopedia.thefreedictionary.com/I+think+therefore+I+am

You're welcome! I just hope my explanations are good enough for people here. Although I'm a native speaker, I'm not an English teacher! hehe

There are a few places that "last" can go in that sentence. "It has been years since I last saw you." or "It has been years since i saw you last." or "It has been years since last I saw you." All of those are correct ways to

"It has been years since I saw you last." This one is the correct sentence.

What do you mean by "development"? Can you clarify that? It'll help us give you a good answer.

It sounds pretty good to me, Jobb. I'm not sure if "piecework" is a real word, but I know what you mean by saying that.

for "English listening comprehension", you'll find lots of helpful links. -Haoqide

? -Haoqide

Actually "giant" and "massive" are adjectives, not verbs...can you clarify the question for us?

Welcome to the forums, Rahul! Nice picture!