Complex sentences practice

Hi everyone! Today I'm gonna practice with more complex sentences. I've realised that I use only simple, short sentences, and now I want to improve my writings.

This summer I'm going to do a report about lazy evaluations in Haskell programming language because I'm one of the enthusiasts of the Russian Haskell community.

Because the last four days was rainy, I couldn't  ride my mountain bike.

Modern English language contains more than 350 irregular verbs, although in daily practice we use less than 100 of them.

I don't drink any alcohol for the last 11 years because I know it's a dangerous drug and can to destroy human's  relationships.

I love Hayao Miyazaki's anime films because I see the real feelings, complex personalities and beautiful nature.

Assuming you're a normal adult you can learn at least one foreign language perfectly.