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You also asked "What are the functions of commas"

In this context the commas are a sign of a side remark, a parenthetical statement that is used to provide further information. If you were reading this sentence aloud you would have a slight pause for the commas and a possible inflexion change.

A simpler way to write the sentence would be to move this clause to the end of the sentence:

Three things that are hard to build up once lost.

Three things that are hard to build up once lost.

English rarely uses different forms of words to convey the grammatical function of a word and add to its meaning which is common in many other languages. This can be confusing to speakers of other languages.

Writers often decide to write a sentence in a particular way so that the effect of the sentence is different, to introduce different tone or rhythm. This is common in other languages too but having different word forms can make the meaning much clearer.

You also asked "What are the functions of commas"

In this context the commas are a sign of a side remark, a parenthetical statement that is used to provide further information. If you were reading this sentence aloud you would have a slight pause for the commas and a possible inflexion change.

A simpler way to write the sentence would be to move this clause to the end of the sentence:

Three things that are hard to build up once lost.

English rarely uses different forms of words to convey the grammatical function of a word and add to its meaning which is common in many other languages. This can be confusing to speakers of other languages.

Writers often decide to write a sentence in a particular way so that the effect of the sentence is different, to introduce different tone or rhythm. This is common in other languages too but having different word forms can make the meaning much clearer.

You also asked "What are the functions of commas"

In this context the commas are a sign of a side remark, a parenthetical statement that is used to provide further information. If you were reading this sentence aloud you would have a slight pause for the commas and a possible inflexion change.

A simpler way to write the sentence would be to move this clause to the end of the sentence:

Three things that are hard to build up once lost.

English rarely uses different forms of words to convey the grammatical function of a word and add to its meaning which is common in many other languages. This can be confusing to speakers of other languages.

Writers often decide to write a sentence in a particular way so that the effect of the sentence is different, to introduce different tone or rhythm. This is common in other languages too but having different word forms can make the meaning much clearer.

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source | link

You also asked "What are the functions of commas"

In this context the commas are a sign of a side remark, a parenthetical statement that is used to provide further information. If you were reading this sentence aloud you would have a slight pause for the commas and a possible inflexion change.

A simpler way to write the sentence would be to move this clause to the end of the sentence:

Three things that are hard to build up once lost.

English rarely uses different forms of words to convey the grammatical function of a word and add to its meaning which is common in many other languages. This can be confusing to speakers of other languages.

Writers often decide to write a sentence in a particular way so that the effect of the sentence is different, to introduce different tone or rhythm. This is common in other languages too but having different word forms can make the meaning much clearer.