be going to / will

　　用于條件句時(shí)，be going to 表將來，will 表意愿

　　例句：

　　If you are going to make a journey, you'd better get ready for it as soon as possible.

　　Now if you will take off your clothes, we will fit the new clothes on you in front of the mirror.

　　一般現(xiàn)在時(shí)表將來

　　1)下列動詞：come, go, arrive, leave, start, begin, return的一般現(xiàn)在時(shí)表將來。這主要用來表示在時(shí)間上已確定或安排好的事情。

　　The train leaves at six tomorrow morning.

　　When does the bus star? It stars in ten minutes.

　　2)倒裝句，表示動作正在進(jìn)行，如：

　　Here comes the bus. = The bus is coming.

　　There goes the bell. = The bell is ringing.

　　3)在時(shí)間或條件句中。

　　When Bill comes (不是will come), ask him to wait for me.

　　I'll write to you as soon as I arrive there.

　　4)在動詞hope, take care that, make sure that等后。

　　I hope they have a nice time next week.

　　Make sure that the windows are closed before you leave the room.