现在进行时的现在分词的结构

二、现在分词的构成：

1.大多数动词后可在动词后直接加-ing．

Eg: carry-carrying,catch-catching,drink-drinki ng, enjoy-enjoying hurry-hurrying ,do-doing , read-reading , think-thinking

2. 如果动词以-e结尾,则去掉-e,再加-ing,

如come-coming , have-having , make-making,ride-riding,write-writing,tak e-taking,use-using．

3. 如果动词只有一个元音字母,而其后跟有一个辅音字母时,将此辅音字母双写,再加-ing

如：hit-hitting,let-letting, put-putting,run-running,sit-sitting．

4. 如果动词有两个音节,且重音在第二个音节上,则末尾的辅音字母须双写,再加-ing,

如: for’get-forgetting,pre’fer-preferring,up’set-upsetting．试比

较’benefit/benfiting, ’differ/differing,’pro fit/profiting,这些词的重音在第一个音节上,因此其末尾的辅音字母不双写．

5. 以-ic 结尾的动词,应先把-ic 变为-ick,再加-ing,eg: panic/panicking,picnic/picnicking,但lie/lying ,die/dying,tie/tying是特殊变化要记住．