1、把动词变成现在分词形式易出错。例：

(1)误：They are swiming (swim) .

正：They are swimming (swim).

(2)误：Jenny is plaiing (play) football.

正：Jenny is playing (play) football.

解析：A、动词变现在分词可有如下口诀:一般-ing;哑e先去e;重闭单辅先双写;-ie结尾y来替。

B、动词现在分词的变化规则要与名词变复数、动词变现单三等规则区分开来。

2、谓语部分的构成不完整：丢掉be动词，或忘记把动词变成现在分词。例：

(1)误：Look! Two children flying (fly) a kite in the park.

正：Look!Two children are flying (fly) a kite in the park.

(2)误：Li Ming isn't read ( not read) a book in bed now.

正：Li Ming isn't reading ( not read) a book in bed now.

解析：现在进行时的谓语部分的构成是"be+现在分词"，二者缺一不可，这一点必须要牢记。

3、对动词或动词词组提问时，丢掉代动词doing。例：

The students are singing in the room.(对划线部分提问)

→误：What are the students in the room?

→正：What are the students doing in the room?

解析：现在进行时态中对动作提问可记住此句式"What +be +主语+doing+其它?"或简写为"What......doing......? "句式。

4、现在进行时态的谓语部分是并列结构时，容易忽视第二个以及第二个以后的动词用现在分词形式。例：

孩子们在跑还是在跳?

误：Are the children running or jump?

正：Are the children running or jumping?

解析: or连接的是两个并列成分，动词形式须一致。