Hi Tung Quoc, If this is a question (in an examination paper), you can write it as - Correct the following: OR Correct the following sentences/words: (there is no need to use 'Please' and make sure you use the colon). If you mean it as a request - Please correct the following: OR Please correct the following sentences/words.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.