Adverbs of cause and reason

English language and communication skills
Because, since, as, so that, for, due to,” “owing to,” and “on account of are words and phrases play the role of adverbs of cause and reason. These adverbs explain the motivating force behind an action. These words answer why? and for what reason? This adverbs help establishing cause effect relationship between main and subordinating clause. So let’s enjoy learning adverbs of cause and reason. 

Types of adverbs

a) Adverb of time
b) Adverb of place
c) Adverb of manner
d) Adverb of degree
e) Adverb of frequency
f) Adverb of reason
g) Adverb of comparison
h) Adverb of contrast

Understanding adverbs of cause and reason

The match was called off because it was raining heavily. (The match was called off– effect) (It was raining heavily–cause) 

Since they arrived so late, the meeting was cancelled. 

Definitely, he will be winner as he is working so hard. 

There is huge landslide, so there is no passage for traffic. 

Because– for strongest cause
Since– for weaker cause
For– for weakest cause
As– for known cause

In the above examples, because, since, as, so, are used as subordinating conjunctions for cause and reason. They combined main clause as effect with subordinating or depending clause as cause or reason. Because, adverbs of cause and reason also play the role of subordinating conjunction as well. 

Apart from these, there other phrasal words used  to play the role of adverbs of cause and reason. These are: because of,” “due to,” “owing to,” or “on account of.”

Phrasal words as adverbs of cause and reason 

Referee delayed the match due to wet outfield. 
Stock market bounced back because of surprise ceasefire. 
Owing to his personal reason, he withdraws from competition. 
The train was cancelled on account of waterlogging. 
In the above examples, due to, because of, owing to, on account of” are act like adverbs of cause and reason. All the phrases express reason or cause behind a particular action or situation. 

Cause and effect relationship 

These adverbs construct cause and effect relationship between main clause and depending clause. Look at the following formation:

Main clause + conjunction + depending clause

Here, main clause acts as effect of cause as depending clause. Let’s see some useful examples:

He had failed to pass this exam because he wasted his time in the last month.

SHe has become too lazy because her father went out for training.

Brian is feeling exhausted as he has been playing since morning

Since the water reservoirs were dried out in summer, the animals began to migrate in the human settlements.

Hope, you enjoy this piece of writing on this topic. No doubt, this section of adverb is highly important.
https://dictionary.cambridge.org/grammar/british-grammar/conjunctions-causes-reasons-results-and-purpose

Positive comparative and superlative degrees