關於現在進行式的問題

其他人都解答得太長. 其實中途斷左,都叫做緊,所以 I am doing sth

Whatever Peter asked you,present perfect tense should be used.Practice makes perfect;
The perfect (grammar) is the form of a verb which is used when talking about a period of time up to and including the present.
In English it is formed with "have" and the past participle;eg:-have painted;eg:-I have painted the wall;
eg:-I have painted the house/ room;
eg:-I have painted the sitting room
Or I've been painting the sitting room before your call.
The present perfect continuous tense be used.
I am painting the wall
I am painting the house/room.
I am painting the sitting room.
Here the present continuous tense can be used also.

用現在進行式表達"正在做"的事是正確的...雖然你咁問可能是想問其實是"正在聽電話"...油油是剛來在做的事是否不能用現在進行中...

其實所謂現在進行...是在指時空的相對性的: 你聽完電話是否還是回去油油吧...那麼油油便是你正在進行中的事，聽這來電反而是這進行中的事的干擾(所以不計)。

希望這講解讓你明的tense在英語中的表達作用。

不過嚴格而言
painting只用這字可以指油油或者畫畫
所以一般英語人不會單字painting而是會說

I'm painting the wall.
I'm painting my house/room.
I'm painting the XXX.

反而單字painting一般是指畫畫，因為painting(noun)是油畫或畫作的名詞
所以不會說I'm painting a painting.而省去a painting的意會到painting的必定是一幅畫。

建議你加埋你paint的是甚麼便perfect啦。