我当然不贩毒。用英语怎么说？

我当然不贩毒。

I certainly don't deal drugs.

certainly

adv. 无疑，当然，确定，肯定；

例句
The Party was certainly not an official adjunct of the police department.
该党派肯定不是公安部门的官方附属机构。

deal

vt. [牌戏]分，分配，经营，施予；n. （一笔）交易，许多，待遇，发

例句
The government is taking emergency action to deal with a housing crisis...
政府正采取紧急措施解决住房危机。

drugs

n. 药物( drug的名词复数 )，药剂，麻醉药，毒品；

例句
The testing and approval of new drugs will be speeded up.
新药品的检测和审批速度将会加快。