# What are elongated hyphens? Which sentence demonstrates the correct use of elongated hyphens?

## Elongated hyphens would make this sentence grammatically correct: Gideon and Francis took a difficult but not interesting science course. Gideon – and – Francis took a difficult but not interesting science course. Gideon and Francis took a difficult but not – interesting science – course. Gideon and Francis took a difficult – but not interesting – science course. Gideon and Francis - took a difficult – but not interesting science course.?

Jun 4, 2016

Gideon and Francis took a difficult — but not interesting — science course.

#### Explanation:

If you are going to use an elongated hyphen, also known as an em dash (—), then it should emphasize something with making the sentence flow smoothly.

For example, I would not say to you:
Gideon ... AND ... Francis took a difficult course.

They usually can substitute commas, but they're used to add emphasis.