What are some common grammatical errors that people make, while speaking/writing English?

Borrow and Lend : Mostly people incorrectly use the word Borrow instead of Lend .It would be wrong to say "He borrowed me his book for the afternoon " rather the correct way is "He lent me his book for the afternoon " . Concept behind it Someone doesn't borrow something to someone, but from someone, as in "I borrowed her calculator." Likewise, lending is something only a giver does. Just remember, the person doing the giving lends and the person receiving something borrow

Its and it's. People seem to be confused about the difference between its and it's. In some cases, people use both the words interchangeably without even realizing they are 2 different words. It's is short for it is or it has. Example: It's time to leave (It is time to leave). It's raining (It is raining) It's been raining awhile (It has been raining awhile). It's been a long time (It has been a long time) To check whether the use of "it's" is correct, check whether it expands into it is or it has. If not, the usage is wrong. Its is the possessive form of the pronoun "it." Example: Its colour is pink. It has crossed its limits. To check whether you are using its correctly, try using her and his instead of its. (Her and his are feminine and masculine possessive forms respectively.) So, its and it's are homophones.