英语现在分词的三种形态

Question

急要!!!!!!!

Answer 1

　1)现在分词的时态形式
　　一般式writing
　　完成式having written
　　2)现在分词一般式其所表示的动作与谓语动词所表示的动作同时发生，或在谓语动词所表示的动作之前或后发生。如：
　　Working together with Dr. Bethune，we learnt a lot from him.
　　我们在和白求恩大夫一起工作期间，向他学到很多东西。
　　(working与leamt同时发生)
　　Knowing that they were going abroad next week ，they began to make preparations.他们知道他们下星期要出国，所以都开始作准备。(knowing发生在began之前)
　　He came up to me，saying"Glad to see you again."他来到我跟前说道，"很高兴又见到你。"(saying发生在came之后)
　　3)现在分词完成式其所表示的动作发生在谓语动词所表示的动作之前，常常用作状语，表示时间或原因。如：
　　Having done his homework，the schoolboy began to write his diary.这个小学生做完作业后，开始写日记。(having done his homework发生在began之前，表示时间。)
　　Not haying done it right, I tried again.没有做对，我就又试。
　　(not having done发生在 tried之前，表示原因。)
　　现在分词的被动语态
　　一般式being written
　　完成式haring been written
　　如：
　　This is one of the many dams being built the river.这是沿河修筑的许多水坝之一。
　　Being surrounded，the enemy troops were forced to surrender.敌军被包围了，被迫投降。
　　Having been asked to stay，I couldn't very well leave.人家请我留下，我就不好离开了。

Answer 2

直接加ing，例如reading

去e加ing，例如make变成making

双写最后一个字母，例如sit变成sitting