diff --git a/2-ui/3-event-details/4-mouse-drag-and-drop/article.md b/2-ui/3-event-details/4-mouse-drag-and-drop/article.md
index 6390b392..2c781c59 100644
--- a/2-ui/3-event-details/4-mouse-drag-and-drop/article.md
+++ b/2-ui/3-event-details/4-mouse-drag-and-drop/article.md
@@ -101,7 +101,7 @@ ball.style.left = pageX - ball.offsetWidth / 2 + 'px';
 ball.style.top = pageY - ball.offsetHeight / 2 + 'px';
 ```
 
-Not bad, but there's a side-effect. To initiate the drag'n'drop can we `mousedown` anywhere on the ball. If do it at the edge, then the ball suddenly "jumps" to become centered.
+Not bad, but there's a side-effect. To initiate the drag'n'drop, we can `mousedown` anywhere on the ball. But if do it at the edge, then the ball suddenly "jumps" to become centered.
 
 It would be better if we keep the initial shift of the element relative to the pointer.