读音： [ðɪs] [ɪz]
this is释义：这是。
this
（1）、读音： [ðɪs] 美 [ðɪs]
（2）、释义：这，这个，做介词；这，这个，做形容词；这样地，就是这样，做副词
（3）、形式：
复数： these
（4）造句：
When food comes out of any oven, it should stand a while.
食物出炉后都应该静置一会。
This is what I will do. I will telephone Anna and explain.
下面是我要做的：我要给安娜打电话解释清楚。
You feel that it's uneconomic to insist that people work together in groups. Why is this?
你觉得要求大家分组工作不划算，这是为什么呢？
I came here by chance and was just watching what was going on, when this girl attacked me
我碰巧来到这儿，正看着热闹，突然一个女孩袭击了我。
'If you'd prefer something else I'll gladly have it changed for you.
“您要是喜欢别的，我很乐意帮您调换一下。
is
（1）、读音： [ɪz]
（2）、释义：是，做动词；存在，做名词
（3）、形式：
过去式： was
（4）造句：
This man is an animal, a beast
这人是个畜生，是个野兽。
Clearly there is a problem here
显然，这里出了个问题。
This is a common fallacy which has no basis in fact.
这是一个没有事实依据的常见谬误。
Choosing the right type of paint for the job is half the battle.
选对了涂料，这项工作就成功了一半。
My life is ruined and I suppose I only have myself to blame.
我的一生都毁了，我想这只能怪我自己。