Front

Express purpose or cause:

Back

therefore

Front

Show or explain:

Back

such as

Front

Add or continue a thought:

Back

in addition

Front

Contrast or change a thought:

Back

however

Front

Sum up or conclude:

Back

in the end

Front

Express time:

Back

first

Front

Allergic to chocolate; cannot eat it.

Back

I'm allergic to chocolate, in other words, I cannot eat it.

Front

She likes animals, e.g., dogs, cats, and birds.

Back

She likes animals, for example: dogs, cats, and birds.