What do you think of the experiment carried out at the present time
改:
What do you think the experiment is being carried out at the present .
What do you think插入语
(固定的,很多地方都这样用)
而且think of后面应该加短语
at the present 就表示"现在"
present time 可以表示"现代"
你的句子连谓语都没有,所以要加个谓语
再从句面意思翻译
"现在实验被进行"
实验是物体,不会自己进行
所以要用现在进行时的被动语态
"be+being+过去分词"
is being carried out