If if [if; If] Conjunction A 1 If …, if … A. [When speculating about what may be realized now, in the past and in the future] If you are tired, we will go straight home. If you are tired, after you finish reading this book, we will go straight home. Please give it back to me. If you finish reading this book, please give it back to me. If he did it, he committed a crime. If he did that, he committed a crime. I won't listen to him. Do you mind if I open the window? Do you mind if I open the window? May I open the window? If he comes, I will tell him. If I were you, I would try my best to help him. If you kneel, I will feel relieved, but you will feel sorry. If you knew how much I had suffered, if I were you, you would sympathize with me. I will help him. If I knew, I would do it. If I had known, I wouldn't have done it. If he had taken my advice, he would be so different now. If he had taken my advice, he wouldn't be in such a predicament now. If it rains tomorrow, I won't come. I won't go if it rains tomorrow. What would you do if I were to die tomorrow? What will you do if I die tomorrow? Even if ... (even if) if he is rich. (archaic) Even if he is rich ... if I am wrong, you are not absolutely right. Even if I am wrong, you are not absolutely right. Naughty as he is, he is a good boy. Even though he is naughty, he is still a good boy. It is not unreasonable to patrol. Even if his attitude is a little arrogant, he can't be said to be unreasonable. (dictation) I can go; I can go (agree to the invitation) → even if, if not. Even if …, however … (when) if he hadn't been industrialized when he was young, he is working very hard now. It is true that he was not diligent when he was young, but now he works very hard. If I have any questions, I will ask. Whenever in doubt, I ask 4 [omit the main clause of the conclusion and use it as an exclamation sentence to express surprise, longing, etc. ] If only I knew! If only I knew! If only I knew! If I hadn't lost my watch! If only I hadn't lost my watch! Damn, I lost my watch! Why, if it isn't Mr. Smith! Hey, isn't that Mr. Smith B [Leading indirect question] Is it ... (While) Ask him if it is true. Ask him if it's true. I want to know if he is at school. I don't know if he is at school, even if you don't like it, you must do it. Even if you don't like it, you have to do it for a day [an inch, a penny, etc]. ] One day [one? A penny] A lot. Indeed, at least he will be seventy a day. Every day is not bad. He is really seventy years old. The enemy has 2000 people, if they are Japanese. There are at least two thousand enemies. He is at least six feet tall. (.One? The spring of going home? He has at least six? Jan? I walked 15 mile. (Not a few yards) I did walk 15 miles. If yes, if yes, if yes (book), if yes. Even if there are (books), there are few (wines). If there is. Even if there is (wine), it is rarely correct. If there are any mistakes, they will be corrected. If anything, it can even be said that things are, if anything, even better. True greatness is rarely related to status and power. Speaking of it, true greatness has nothing to do with status and power. If not? If not ... (but for? ) If it weren't for. ? But for your advice, I wouldn't have done it. I couldn't have finished it without your advice. If not ... (but for? If there is no sun, nothing can survive. If there is no sun, nothing can survive. If it is necessary [possible], I will do so. If necessary, I will do it, if not (1), even if it is not … this is highly desirable, if not necessary, the difference is drawn. Even if it's not necessary, it's appropriate to make a distinction. (2) If it's not … if it's not in a department store, where should I go to get static electricity? Where should I buy stationery if I'm not in a department store? If only (1)→ conj. Even if … we must respect him, even if it is only because of his honesty. Even if it is only because of his honesty, we must respect him. I want to see his face. Just to see him, I want to go, too. What if you like it → like it → please → please? →what pron countable noun (pl. ~s) condition; Suppose that if there are too many ifs in his speech. There are too many "ifs and buts" reasons [excuses] to delay things. Do it now, don't borrow it all.