Với nhiều từ vựng và cách thức giúp chúng ta hiểu rõ được nên sử dụng như thế nào cho đúng. Không chỉ thế đây còn là tài liệu giúp chúng ta sửa chữa các lỗi về văn phạm đơn giản nhất. Đây là một tài liệu giúp ta tham khảo nhanh để biết những lỗi ta hay mắc phải khi sử dụng tiếng anh. | COMMAS a A comma should never divide a subject from its verb. The two go My parents had very strict views. X My parents had very strict views. Take extra care with compound subjects The grandparents the parents and the children were in some ways to blame. X The grandparents the parents and the children were in some ways to blame. b Commas should never be used in an attempt to string sentences together. Sentences must be either properly joined and commas don t have this function or clearly separated by full stops question marks or exclamation marks. Commas have certain very specific jobs to do within a sentence. Let us look at each in turn i Commas separate items in a list I bought apples pears and grapes. She washed up made the beds and had breakfast. The novel is funny touching and beautifully written. The final comma before and in a list is optional. However use it to avoid any ambiguity. See ix below. ii Commas are used to separate terms of address from the rest of the sentence Sheila how nice to see you Can I help you madam I apologise ladies and gentlemen for this delay. Note that a pair of commas is needed in the last example above because the term of address 50 COMMAS occurs mid-sentence. It is a very common error to omit one of the commas. iii Commas are used to separate interjections asides and sentence tags like isn t it don t you haven t you . You ll notice in the examples below that all these additions could be removed and these sentences would still be grammatically sound My mother despite her good intentions soon stopped going to the gym. Of course I ll help you when I can. You ve met Tom haven t you iv Commas are used to mark off phrases in apposition Prince Charles the future king has an older sister. The phrase the future king is another way of referring to Prince Charles and is punctuated just like an aside. v A comma separates any material that precedes it from the main part of the sentence Although she admired him she would never go .
