Indirect object before Subject Is it correct to put indirect object before Subject like here: To all my students I recommend practicing dialogues and repetition drills. Is it equal with: I recommend practicing dialogues and repetition drills to all my students.

Use of "Could + Perfect Infinitive" Hey, I need your help, i'm confused. I encountered some problems with "could + Perfect Infinitive". On courses I learned that "could have done smth." means that you were able to do something, but you didn't do it. It's related to past. I know this. But am I understanding right the next grammar? "Couldn't/Can't + Perfect Infinitive" at first, as i understand, for instance in this sentence - He couldn't/can't have done this! - Like I don't believe, i'm definitely sure he didn't do it. The same with "It can't be!", "She can't be so stupid!", but these one are in the present. I don't believe that may be true. Right? At second, it also can be used in such situation when, for example "I couldn't have passed final test without your help", it's when I wouldn't have been able to do something if something hadn't happened. But I did it. Kinda conditional sentence. Right? Two options to use: 1. Certainty that something couldn't have happened. 2. When you look back in the past and say that something wouldn't have been able to happen if there weren't some conditions that helped to make it come true. And what's the difference in this case between Can't have done and Couldn't have done?

Adverb Clauses. Which one sentence is correct? I live in the city where are many old buildings built in times of USSR. I live in the city where there are many old buildings built in times of USSR. (I know that I can simplify this sentence by saying "I live in the city with many old buildings built in times of USSR." but I jsut want to know if it's right). To me, first sentence is grammatically incorrect. Or give your own variant which you think is more correct and less awkward.

First notebook entry: Introducing myself Hi. So I registered here because my penpal advised me this website. And I hope I'll find people to speak and practice english here.