How is the pronunciation of a Russian "r" sound different from English? Are there different types of "r" in Russian?
The Russian "r" sound is very different form the English "r". Unlike English "r" where the tongue doesn't move and doesn't touch the hard palate, Russian "r" is rolled which means there are vibrations going through the tongue. The tongue touches the hard palate several times and then releases the at the vowel/final position. There are no different types of "r" in Russian but certain regions pronounce it softer.
How do you explain the difference between the usage of the verb "avoir" and the verb "être" to a total beginner student of French?
the verb "avoir" expresses possession and also refers to age, whereas the verb "être" is used to define what/how things/people are, for example give personal information such as nationality, profession, personal characteristics, marital status etc.
What is the difference between second and third conditional sentences? Complete these examples and match them with second/third conditional: If I (know) about this exhibition last Saturday, I (go) there with you. If I (be) you, I (practice) English more often.
Second conditional is usually an expression of regret about impossible things in the present opposed to unlikely things in the future: If I were you, I would practice English more often. Third conditional refers to things that didn't happen in the past and their imaginary consequences: If I had known about this exhibition last Saturday, I would have gone there with you.