Difference Between Through and Along

Through and Along are used as prepositions and adverbs in coining sentences in the English language. ‘Through’ is the preposition used to denote a noun’s travel from one point to another. ‘Along’ is a preposition that is used to denote the length of something. 

Through vs Along

The main difference between Through and Along is that ‘through’ is the word used to denote a subject’s travel from one point to another whereas ‘along’ is the term used to mention the complete length of something

Through vs Along

‘Through’ can act as a preposition, adjective, and adverb in English grammar. When it is used as an adjective, it describes the movement of the noun from one side to another.

‘Along’ acts as a preposition as well as an adverb in a sentence. When used as a preposition, it means the length of the subject or the lengthwise comparison of something.


Comparison Table Between Through and Along (in Tabular Form)

Parameter of ComparisonThroughAlong
PrepositionThrough is a word used to mean the noun’s motion from one point to another.Along denotes the length of a noun or explains the complete length of the noun’s motion.
AdverbAs an adverb through denotes the movement of something in a closed passage.Along is used as an adverb in sentences that explains a noun’s company with something.
Dimension of motionA 3-dimensional motion is meant when ‘through’ is used to denote the movement of something.A linear motion of something is meant by using along in a sentence.
Parts of speechThrough can be a preposition, an adverb, and an adjective according to a particular context.Along can be a preposition or an adverb according to the meaning intended.
Derived wordsThroughoutAlongside, here along, there along


When to Use Through?

The English language uses the word ‘through’ as a preposition in places where an opening and end of a location is meant. It means to enter something from its start and to come out of it by its end.

For example: The rat passed through the hole.                               

‘Through’ can be used as an adverb at places where the period of something is concerned. It explains the time needed to complete an ongoing task.

For example:

  1. This cab goes through Howrah.

Also, ‘through’ can be used as an adjective in sentences. Here ‘through’ means to complete a task to conclude a task by getting the output of it.

 For example:

  1. He has done through the work.
through 1

When to Use Along?

Along is also a preposition used to mention the travel of something from a point to another. But unlike ‘through’ along means only beside the mentioned place whereas through means in between of the mentioned passage. 

For example:

  1. They walked along the river.

When ‘along’ is used as an adverb, it can be used to mention the company of something or someone. It is used in sentences where the meaning of ‘being with’ is intended.

For example: 

  1. She walked along with him
  2. There should be a park along this river.

Along can be used in many more contexts as there are many derived words.  Alongside and Along with are some of the words that are worth mentioning.


Main Differences Between Through and Along

  1. As a preposition ‘through’ is used in places where the path of travel of a noun is expected. Along is used in places where the length or distance of the path is expected.
  2. Through has the meaning of moving through a passage when used as an adverb whereas ‘along’ has the meaning of ‘being in company with’.



The word meaning of ‘through’ can be different in different contexts. It is used as a preposition in places where the travel of the subject is concerned.

Along is another word that can be mistaken in the place of through. Along can be used as a preposition where the distance or the length of something is meant.


  1. https://dictionary.cambridge.org/dictionary/english/through
  2. https://dictionary.cambridge.org/dictionary/english/along
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