2 correct punctuation
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Simply based on general usage, I think emphasis on you speak like that is stronger if you add a comma

You speak like that, because you are unsure of yourself.

That one should keep his words both soft and tender, because ...

both emphasize the importance or concern about how someone speaks, because of the pause added by the comma usage.

Simply based on general usage, I think emphasis on you speak like that is stronger if you add a comma

You speak like that, because you are unsure of yourself.

That one should keep his words both soft and tender, because ...

both emphasize the importance or concern about how someone speaks, because of the pause added by the comma usage.

Simply based on general usage, I think emphasis on you speak like that is stronger if you add a comma

You speak like that because you are unsure of yourself.

That one should keep his words both soft and tender, because ...

both emphasize the importance or concern about how someone speaks, because of the pause added by the comma usage.

1
source | link

Simply based on general usage, I think emphasis on you speak like that is stronger if you add a comma

You speak like that, because you are unsure of yourself.

That one should keep his words both soft and tender, because ...

both emphasize the importance or concern about how someone speaks, because of the pause added by the comma usage.