common grammar mistakes . Spelling a word wrong. When you type, its easy to change a word or leave out a letter. When you finish a piece of... . Choosing the wrong word. Searching for the right word doesnt always mean you find it. You might choose a word that... . Unnecessary comma. Commas ... See more. When you type, its easy to change a word or leave out a letter. When you finish a piece of writing, check your spelling by rereading your work or using a digital tool to help look for errors. Example . Incorrect I would like See more. Commas are used to separate and group ideas. However, you may not need a comma even though there are multiple ideas in a sentence. Example . Incorrect Sharon and Sue, See more. Searching for the right word doesnt always mean you find it. You might choose a word that looks or sounds similar but doesnt have the same definition. For example, the word loose means something isnt tight, See more. When listing a series of things in a sentence, you need to separate the list items by