hj黄小兔
正在进行时中，谓语动词后加ing。如：I'm playing football。一些特殊表达，如：be good at doing sth；enjoy doing sth；be busy doing；feel like doing；thank you for doing.1)一般情况下直接加ing，think---thinking、sleep---sleeping study---studying、speak---speaking carry---carrying、say---saying 2)以不发音的字母e结尾的单词，去掉字母e，再加ing wake---waking、make---making、come---coming take---taking、leave---leaving、have---having 3)以重读闭音节结尾，呈现“辅，元，辅”结构的动词，先双写末尾的辅音字母，再加ing。初中学过的这类词有：begin，cut,get,hit,run,set,sit,spit,stop,swim,beg,drop,fit,nod,dig,forget,regret,rid,等。(visit不是以重读闭音节结尾，不用双写) travel虽然重读第一音节，词尾音节不重读，但是现在分词仍要双写末尾辅音字母，然后再加ing，如：travel---travelling.初中阶段此类词只有这一个。 4)以y结尾的动词，直接加ing carry——carrying、enjoy——enjoying 5)以ie结尾的动词，把ie改为y，再加ing die---dying、lie---lying
XiangZong12
动词加ing的规则口诀：动词ing形式的变化规则主要有八种，分别是：动词加+ing；双写最后的辅音字母再加+ing；不发音字母e结尾的动词去掉e再加+ing;y结尾的动词直接+ing；以ie结尾的动词改ie为y再加+ing等。
01. be going to do
表示最近打算进行的事,具有一定的目的性和计划性.(这种安排既有可能是主语做出的,也有可能是别人安排 的)
We are going to have a meeting tomorrow.
表示即将要发生的事情，不可避免要发生的事情.(多用于表天气)
It's getting cloudy. It is going to rain.
02. be to do
表示按计划要发生的事,一般认为,这种计划是双方约定的,而 be going to do 所指的安排不一定是双方约定 的.
We are going to meet them at the north of the bridge, because it is the only road they can follow. 我们打算去桥的北边堵他们,因为那是他们的必经之路.
We are to meet each other with them at the north end of the bridge. 双方约定好要在桥的北边见面.
be to do 还有很多情态用法,be going to do 没有以下用法.
You are to wash your hands before every meal.(表需要=need
As Warrent's parents,you are to set a good example to him.(表责任,义务,相当于,must should) Are we to clean the corridor,Mrs Dell? (表征求意见=shall)
The temperature is to drop soon.(表示可能性)
Would she get cross if I were to sail into her of lying?(表假设)
