Please switch off the Air-conditioners when you are leaving the relaxation area. Whoever is using this area ensure that A/C units to be switched off when they are leaving the area.
Please don’t let A/C units keep turn on when the area is not in use.
" anonymous Please switch off the Air-conditioners when you are leaving the relaxation area. " anonymous Whoever is using this area ensure that A/C units to be switched off when they are leaving the area. No.
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You meant "Are these sentences grammatical?"
anonymousPlease switch off the Air-conditioners when you are leaving the relaxation area.
"Please switch off the air conditioners when you are leaving the relaxation area." After spelling correction, this is fine, but signage is normally in a more telegraphic style to save space: "Please switch off the air