They are the phrases that express when the action indicated by the verb occurs. The adverbs used are: after, before, when, while, as, as soon as, since, until, by the time, once, as/so long as, whenever, every time (that), the first time (that), the last time (that), the next time (that).
The phrases that indicate the cause or the effect that causes the verb that’s in the main clause. It is called then adverb clause of cause-effect to the part of the sentence that includes the adverb of cause-effect and the effect or cause provoked by the adverb. The adverbs used are: because, now that, since.
Now it’s time you practice a little the adverbial clauses of cause-effect. Read the explanation and then answer the exercise.
The phrases that express unexpected results. It is called then adverb clause of contrast to the part of the sentence that includes the adverb of contrast and the result that it wasn’t the expected considering the verb of the main sentence. The adverbs used are: even though, although, though.
The phrases that express direct contrast that are exactly the opposite. It is called then adverb clause of direct contrast to the part of the sentence that includes the adverb of direct contrast and the opposite of the verb or adjective of the main sentence. The adverb used: while
The phrases that express possible conditions while the main sentence expresses the result. It is called then adverb clause of condition to the part of the sentence that includes the adverb of condition which expresses the range of possible conditions. The adverbs used are: if, unless, only if, whether or not, even if, in case.
**In the references section you will find some links to practice each type of adverb clause**