Text:
It is a fine day today.
There are some clouds
in the sky.
But the sun is shining.
Mr.Jones is with his family.
They are walking
over the bridge.
There are some boats
on the river.Mr. Jones and his wife are looking at them.
Sally is looking at a big ship.
The ship is
going under the bridge.
Tim is looking at an aeroplane.
The aeroplane is
flying over the river.
现在分词：
如果动词以－e结尾，变现在分词时要去掉－e，然后再加- ing.
eg: type --- typing make --- making shine --- shining give --- giving
如果单音节动词仅有一个元音字母而其后跟一个辅音字母时，变现在分词时要将此辅音字母双写。
eg: swim --- swimming sit --- sitting run --- running put --- putting