docs: fix grammatical errors (yangshun#83)

* docs: fix grammatical errors

* Update README.md

Author: Jim Poulakos

README.md

@@ -28,7 +28,7 @@ This handbook is pretty new and help from you in contributing content would be v
 
 ## Why do I want this?
 
-This repository has *practical* content that covers all phases of a technical interview; from applying for a job to passing the interviews to offer negotiation. Technically competent candidates might still find the non-technical content helpful as well.
+This repository has *practical* content that covers all phases of a technical interview, from applying for a job to passing the interviews to offer negotiation. Technically competent candidates might still find the non-technical content helpful as well.
 
 ## Who is this for?
 
@@ -38,7 +38,7 @@ Anybody who wants to land a job at a tech company but is new to technical interv
 
 There are so many awesome books like [Cracking the Coding Interview](http://www.crackingthecodinginterview.com/) and interview-related repositories out there on GitHub, what makes this repository different? The difference is that many existing interview repositories contain mainly links to external resources whereas this repository contains top quality curated content directly for your consumption.
 
-Also, existing resources focus mainly on algorithm questions and lack in coverage for more domain-specific and non-technical questions. This handbook aims to cover content beyond the typical algorithmic coding questions. 😎
+Also, existing resources focus mainly on algorithm questions and lack coverage for more domain-specific and non-technical questions. This handbook aims to cover content beyond the typical algorithmic coding questions. 😎
 
 ## Contents
 

preparing/cheatsheet.md

@@ -1,7 +1,7 @@
 Interview Cheatsheet
 ==
 
-This is a straight-to-the-point distilled list of technical interview Do's and Don'ts, mainly for algorithmic interviews. Some of these may apply to only phone screens on whiteboard interviews but most will apply to both. I revise this list before each of my interviews to remind myself of them and eventually internalized all of them to the point I do not have to rely on it anymore.
+This is a straight-to-the-point, distilled list of technical interview Do's and Don'ts, mainly for algorithmic interviews. Some of these may apply to only phone screens or whiteboard interviews, but most will apply to both. I revise this list before each of my interviews to remind myself of them and eventually internalized all of them to the point I do not have to rely on it anymore.
 
 For a detailed walkthrough of interview preparation, refer to the ["Preparing for a Coding Interview"](./) section.
 
@@ -30,7 +30,7 @@ For a detailed walkthrough of interview preparation, refer to the ["Preparing fo
 |✅|Introduce yourself in a few sentences under a minute or two.|
 |✅|Mention interesting points that are relevant to the role you are applying for.|
 |✅|Sound enthusiastic! Speak with a smile and you will naturally sound more engaging.|
-|❌|Spend too long introducing yourself. The more time you spend talk the less time you have to code.|
+|❌|Spend too long introducing yourself. The more time you spend talking the less time you have to code.|
 
 ### 3. Upon Getting the Question