it is when you intentionally make yourself focus on something.这句话有语法错误么?这是什么结构?

it is earlier when you arrive than when you leave which is black when you buy it,red when you use it,and gray when you throw it away?猜一猜: Which is biack when you buy it,red when you use it,and gray when you throw it away which is black when you buy it,red when you use it,and gray when you throw it away? Which is biack when you buy it,red when you use it,and gray when you throw it away what do you do when (it is raining)?还是what do you do when (it rains)? What do you do when it is raining?的中文翻译 raining,what,do,when,do,it,you,is连句 what do you do when it is raining同义句 when it is a liquid ,you can d_________it you should wears s( ) when it is very hot It is sunny only when you are by my side! phone me when you arrive,late it is omething is a knot when you reserve it,a scar when it's Something is a knot when you reserve it while it's a scar when opened. It is a promise when I love you It is a natural ability when I paly with you. when is it gonna When.is.it?