【Lucy ran faster than Meimei.】
Lucy ran faster than Meimei.露西比梅梅跑得快。
这是一个副词的比较级句型。句中的faster是fast的比较级形式。表示“比较快”。英语副词同形容词一样，也有比较级和最高级形式，用法上也基本一样，比较级要有than ，最高级要有比较的范围。（详细内容请参考本软件的语法部分）例如：
He works hard.I work harder then he works.
他工作努力，我比他工作更努力。
Lucy ran fastest of all.
露西跑的最快。
【Which sport are you in today?】
Which sport are you in today?你今天参加什么运动。Be in…表示“参与…”。例如：
We are in collecting stamp（集邮）.
我们参加集邮。
【Which two classes were in front?】
Which two classes were in front?哪两个班在前面？
In front（of…）表示“在…前面”指在某一范围的整体前面，而in the front of意思是“在某一范围的内部的前面”。例如：
There is a blackboard in the front of the classroom.
教室的前面有一块黑板。
There are three old trees in our classroom.
我们的教室前面有三棵老树。
【All the runners got ready to run.】
All the runners got ready to run.所有的参赛者都准备好了赛跑。
Get ready to do 表示“做好干…的准备”，也可写成be ready to do,但前者强调行为，后者强调状态。它们后面的不定式也可写成for 介词短语。例如：
I get ready to mend my bike.
我准备好要修理我的自行车。
I'm ready to try it again.
我准备好了再试一次。
Are you ready for supper?
你准备好晚饭了。
【He began to catch up with Jim.】
He began to catch up with Jim.他开始赶上了吉姆。
Catch up with 赶上….例如:
Meimei studies very well,I'll catch up with her.
梅梅学习很好,我要赶上她.
Let's have a rest.I can't really catch up with you.
让我们休息休息,我确实赶不上你.
【But he quickly got up and went on running.】
But he quickly got up and went on running.但他很快站起来,继续往前跑.
Go on doing 表示“继续做某事”也可以写成go on with…，但后面接名词。例如：
Go on reading,please.
请接着读课文。
It is very late,but they go on with their work.
已经很迟了，但他们继续干着他们的活。
