My grammar book defines the former of (When), but why can't we interprete it as As(because)? Isn't it confusing? How do you correctly choose?
ex) (Being) Left alone, the girl began to sob.
=> When she was left alone or As she was left alone
Only from context can we know whether she is sobbing because she was left alone, or being left alone allowed her the opportunity to sob.
"She needed to feel accepted by her friends and workmates at the party, so when she found herself being left alone, the girl began to sob".
"During dinner she got a phone call saying her father was ill but she kept it to herself, it was none of their business. Later, out on the terrace and left alone, the girl began to sob".
not a teacher
Student or Learner