Student or Learner
I am wondering if this sentence is grammatically correct.
1.She always remained calm when under pressure.
or do I need to add "when she came under pressure:
2. She always remained calm when she came under pressure.
"When under pressure" is OK. You can omit "when" if you like.
"To remain calm under pressure" is a common phrase.
She always remained calm under pressure.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.