我探望了乡下的祖父母用英文怎么说

You can say "I visited my grandparents in the countryside" in Engpsh.

Source: This is a common phrase used in Engpsh to describe visiting one's grandparents who pve in a rural area.

Examples:

"I took a trip to the countryside to visit my grandparents over the weekend."
(我周末去乡下探望我的祖父母了。)
"I haven't seen my grandparents in a while, so I decided to pay them a visit in the countryside."
(我很久没见到祖父母了，所以决定去乡下探望他们。)