Difference Between Through and Along (With Table)

Through and Along are used as prepositions and adverbs in coining sentences in the English language.  The word meaning of both these terms looks similar but varies in a context. ‘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 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’ 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. It can also be used as an adverb to denote the movement of something in a closed passage. When used as a preposition, it describes the movement from a starting point to a stopping point.

‘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. If used as an adverb, it denotes the companionship of the noun with 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. It is used to describe the movement of something or someone in a passage. While coining a sentence, ‘through’ is used as a preposition to mention the kind of movement the subject travels. 

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. The sentences that have the word through as adverb can mean the whole distance of something. For example:

  1. This cab goes through Howrah.
  2. Go through the exercises daily.

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. It can include the sentences for which the complete journey is continuous. For example:

  1. He has done through the work.
  2. It is difficult to pass through this lane.

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.  The preposition is often used at places of through even though they have a slightly different meaning.

For example:

  1. They walked along the river.
  2. The men marched along the border.

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. Also the word meaning of ‘moving forward’ is intended by ‘along’. It can also be used to highlight the addition of something or someone.

For example: 

  1. She walked along with him
  2. There should be a park along this river.
  3. Ram, along with Shyam and Roop entered the class.

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. Since there is only a minute difference between these derived words, it is important to note down the meaning of these.

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’.
  3. Through is used to describe the travel passages with three dimensions. Along is used to describe a linear motion.
  4. Through is used as a preposition, an adjective, and an adverb according to the intended meaning. Along can be used as an adjective and an adverb.
  5. ‘Throughout’ is a derived word from ‘through’ whereas ‘alongside’, ‘along with’ and ‘where along’ are some of the derived words from along.



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. It can be used as an adverb where the period of something is considered. It can be used as an adjective where the status of a task is meant. Hence there are three forms in parts of speech in the case of ‘through’.

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. It can be used as an adverb in many ways. It has meanings ranging from a companionship to highlighting a certain noun. Also, some words are derived from ‘along’ and they have their meaning.


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