The various forms of grammatical concession in French: not only concessive clauses, but other kinds of constructions as well.
The odd but elegant phrase ne saurait is here explained, also tips for translating it into English are given and examples are provided.
Inversion of noun subject and verb in subordinate clauses in French: clauses introduced by que (whether the direct object relative pronoun or the conjunction), dont, où, and other words.
Presentation of the phrase c'est que, when it introduces an explanation or cause and should be translated as "this is because" or something similar. With examples invented for illustration of this usage and others culled from real-life French authors.