Dan enters a cafe and takes a seat at a table. He signals a waitress. As he waits, he looks over his shoulder around the place./While waiting, he looks over his shoulder around the place.
Are both ok?
As he wait s and While waiting are both OK. he looks over his shoulder around the place Permit me to quibble. If he is looking over his shoulder, he is looking behind him, so he can't see what is in front of him.
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As he waits and While waiting are both OK.
he looks over his shoulder around the place Permit me to quibble.