The phrase "as she placed" is correct and usable in written English.
It can be used to describe an action occurring simultaneously with another action, often in a narrative context.
Example: "As she placed the book on the shelf, she noticed a dust bunny hiding behind it."
Alternatives: "while she set" or "as she positioned".
Wearing the dark green MacLeod tartan of the Highlands, Sir Sean, 69, knelt while the queen touched his shoulders lightly with a sword and then rose and bowed as she placed a small red sash bearing his medal around his neck.
She scowled at me as she placed the glasses in the dishwasher.
"Norm Coleman," an election judge said as she placed a ballot into a pile.
As soon as she placed her hand on my shoulder, my anxiety melted away.
She shouted something into his ear as she placed three glasses and a small bucket of ice on our table.
There was a little giggle as she placed the confection on the counter and stole another glance at my husband.
She is thrilled to once again be living on her own, as she places a high value on self-reliance.
Mitchell delivers a swallow of water and his morning meds, one at a time, naming each one as she places it in his parched mouth.
"Want to see my impression of an STD?" asks her polo-necked, side-ponytailed psychopath as she places a cauliflower in front of her crotch.
She embraces him with one arm and offers her breast with the other hand as she places one foot over his.
Pakistan reels as global financial crises hits poor families hard KARACHI, Pakistan, 29 May 2009 – As she places a chronically malnourished child on a weighing scale in the hospital ward she runs, Dr. Noreen Anwar has no doubt that the economic crisis that started in far-off lands is now having a direct and devastating effect on her most fragile patients.
