You are welcome to answer questions posted in the Ask a Teacher forum as long as your suggestions, help, and advice reflect a good understanding of the English language. If you are not a teacher, you will need to state that clearly at the top of your post. Please note, all posts are moderated by our in-house language experts, so make sure your suggestions, help, and advice house the kind of information an international language teacher would offer. If not, and your posts do not contribute to the topic in a positive way, they will be subject to deletion.
'concern at/over' would be better than 'concern for'. Concern for something is positive: He showed his concern for the well-being of the natives by...'.
It's a pleasure. Incidentally, some people may have been surprised at my not marking the absence of the apostrophe as plain wrong. My point was that many readers wouldn't notice its absence, and many of those who did wouldn't care. There's no chance, given the context, of any misunderstanding.
Is it Charlie or Charlies or Charlie's 
Incidentally, some people may have been surprised at my not marking the absence of the apostrophe as plain wrong. My point was that many readers wouldn't notice its absence, and many of those who did wouldn't care. There's no chance, given the context, of any misunderstanding.
Linear Mode
