Improved grammer. (#2635)

* Update handling-events.md

* Update handling-events.md

content/docs/handling-events.md

@@ -56,7 +56,7 @@ function ActionLink() {
 
 Here, `e` is a synthetic event. React defines these synthetic events according to the [W3C spec](https://www.w3.org/TR/DOM-Level-3-Events/), so you don't need to worry about cross-browser compatibility. See the [`SyntheticEvent`](/docs/events.html) reference guide to learn more.
 
-When using React you should generally not need to call `addEventListener` to add listeners to a DOM element after it is created. Instead, just provide a listener when the element is initially rendered.
+When using React, you generally don't need to call `addEventListener` to add listeners to a DOM element after it is created. Instead, just provide a listener when the element is initially rendered.
 
 When you define a component using an [ES6 class](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Classes), a common pattern is for an event handler to be a method on the class. For example, this `Toggle` component renders a button that lets the user toggle between "ON" and "OFF" states:
 
@@ -142,7 +142,7 @@ The problem with this syntax is that a different callback is created each time t
 
 ## Passing Arguments to Event Handlers {#passing-arguments-to-event-handlers}
 
-Inside a loop it is common to want to pass an extra parameter to an event handler. For example, if `id` is the row ID, either of the following would work:
+Inside a loop, it is common to want to pass an extra parameter to an event handler. For example, if `id` is the row ID, either of the following would work:
 
 ```js
 <button onClick={(e) => this.deleteRow(id, e)}>Delete Row</button>