Tham khảo tài liệu 'turbocharge your gmat sentence correction guide part 8', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Sentence Correction Guide - Sentence Correction 41 Tense in Main Clause Purpose of Dependent Clause Tense In Dependent Clause Example Present To show same-time action Simple Present I am eager to go for a walk because I enjoy exercise. - To show earlier action Simple Past He feels that she made a mistake last year. - To show a period of time extending from some point in the past to the present Present Perfect The congregation believes that it has selected a suitable preacher. - To show action to come Future My teacher says that he will grade the test next week. Simple Past To show another completed past action Simple Past She cooked the salmon because she knew it was fresh. - To show an earlier action Past Perfect He cooked the salmon well because he had attended culinary school. - To state a general truth Simple Present Copernicus believed that the universe is like a giant clock. Present Perfect To show an earlier action Simple Past The lawyer has handled many cases since he passed the bar. - To show action happening at the same time Present Perfect She has grown a foot because she has taken steroids. Past Perfect For any purpose Simple Past The bird had flown for miles before it landed. Future To show action happening at the same time Simple Present I will be a senator if they vote for me. - To show an earlier action Simple Past You will go to the concert if you waited in line. - To show future action earlier than the action of the independent clause Present Perfect My grandmother will finish the puzzle soon if her dog has not eaten the pieces. Future Perfect For any purpose Simple Present or Present Perfect The factory will have produced many widgets long before it closes. The factory will have produced many widgets long before it has closed. Do not confuse between the present perfect has walked and the past perfect had walked . While both verbs convey past action the present perfect verb actually represents present tense. The future tense makes clear that the .
