He isn't famous so people won't know him (use If)i
the hospital will be built ............ 2010
ارجو معرفة سبب الاختيار)at - by - in - on(i
you are going to play , you may be tired (use If)I
he played football . he also watched tv (use In addition to)i

1- If he were famous, people would know him .
2- by ومعناها قبل وتعبر عن المستقبل
3- If you didn't play , you wouldn't( might not) be tired .
4- He played football in addition to watching TV .

if he had been famous people would have known him

In addition to playing football,he watched TV

عشان بتبدأ بحرف كابيتال

2-in
لان السنوات تاخد حرف الجر in