問下英文句子文法的問題

I cover(v)the dishes with white clothes.Cover(v) the dishes.
Put a cover(n) over the top of dishes.
Okay,
Okay.

2014-01-16 19:38:05 補充：
(1)(phrasal v)A cover is covering up the dishes now.
(2)Put another cover n. on the dishes which are covered v. already.
(3)Cover v. the dishes with a cloth.

A cover is covering the dishes now.
似乎有誤, cover 是不會自動.
應該 : a cover <is being covered> the dishes now.

I am participating in ABC Activity now.
可以.

I am handling the problem now.
可以.
handling 改為 managing 比較貼近 problem 這字.

a cover covers the dishes now.
second one correct
third one also correct.