Verb conjugation of "worry" in English

I try to learn English as much as possible so that I can travel next year to the United States. I would agree to your proposal but I also need to find good teachers. My goal is quality and speed.
Vocabulix includes a vocabulary builder for many languages, Spanish and German are just the ones that have the predefined sections. Generally speaking you can invent your own set of expressions and drill them on the speed train.
I agree with you that small cars are often very beautiful, such as Fiat and Skoda, however, bigger cars are safer. I think that old, used cars are usually unsafe. The safety standard changes all the time.