Adverbs of frequency express how often the action of a verb occurs.
Adverbs of manner express how the action of a verb occurs. In English, the vast majority of adverbs of manner end in -ly, whereas in French, they mostly end in -ment. They are created from adjectives.
Adverbs of place express where the action of a verb occurs.
Adverbs of quantity express how much, how many, or to what extent.
Adverbs of time express when the action of a verb occurs.
The three French verb constructions which include some form of être plus a past participle usually require grammatical agreement of the past participle with the subject.
The prepositions après and derrière have somewhat similar meanings, which of course means that students sometimes get them confused. Learn the difference between après and derrière to put all of this confusion behind you.
Auxiliary verbs are also known as helping verbs, because they help form compound conjugations. The key thing to remember about compound conjugations is that it's the auxiliary verb which conjugates for the required tense or mood; the main verb is always a past participle.
The prepositions avant and devant have somewhat similar meanings, which of course means that students sometimes get them confused. Learn the difference between avant and devant to get in front of any potential confusion.