Student or Learner
"I always keep my phone fully charged".
"My phone was half charged".
"My phone had only 70% bettery left".
I'm not a teacher. I speak American English. I've tutored writing at the University of Southern Maine and have done a good deal of copy editing and writing, occasionally for publication.
Use the hyphen before a noun, not after it.
A full-time student; he went to school full time.
A half-charged battery; the battery had only half its charge.
Last edited by Rover_KE; 25-May-2016 at 18:05. Reason: Fixing typo.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.