Exact(2)
If the sentence has an introductory clause (like this one), we separate it with a comma.
Here are two examples of proper dash usage: An introductory clause is a brief phrase that comes — yes, you guessed it — at the beginning of a sentence.
Similar(58)
A long introductory clause, a pileup of punctuation, or a back-and-forth of competing thoughts may signal that a sentence is too tangled.
But if the introductory clause follows a conjunction we don't.
If the meaning of the introductory clause is restrictive we don't use the comma.
This 50-word lead sentence used more words for the backward-facing introductory clause than it did for the new stuff.
Though the response discusses an event or catastrophe leading to genetic drift like responses in Developing Genetic Drift Comprehension the use of the introductory clause "for instance" suggests that the student recognizes this is one example of drift, rather than the only circumstance under which drift takes place: "Genetic drift is evolution that occurs purely by chance.
As I opened them, each featured the same text in the body, with different introductory clauses.
Colons can be used to offset independent introductory clauses.
Don't use the colon in the following situations: When a clause includes an introductory word such as for example, or namely.
Seven short passages with an introductory paragraph.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com