الخطوة 1اختر الخيار الصحيح
الخطوة 2أضف التدريبات التي تعجبك إلى المفضلة
Don't use for in the sense of about. The chief use of for is to convey the idea of being in favour of. If we say that the teacher spoke for bad habits it's like saying that he/she spoke in favour of bad habits!
When you warn to show the means or the instrument with which the action is done, use with. By denotes the order of the action: The bird was shot by the man.
The following take by and not with: by hand, by post, by phone, by one's watch, by the hour, by the dozen, by the metre.