请问if at all ,if not more so,if not impossible分别什么意思请给出例句分析

请问if at all ,if not more so,if not impossible分别什么意思请给出例句分析 翻译 Not often,if at all. If at all possible I don't think he makes many mistakes---- ( )I don't think he makes many mistakes---- ( ) A if not B if some C if at all D if he donesn't 请问这道题应选哪个? Do not walk alone,if at all possible walk in groups.这里的at all是什么用法, Do you mind if I smoke here?_____(No,please don't/Not at all) 请问not at all和not-------at all 的区别 Even if the treasure does not have all.Even if the treasure does not have all. IF ANY,IF SO,IF NOT,IF if never,if any,if not,if if not A：Would you mind if I open the window?B：____________a.Yes,go ahead;b.Not at all;c.Well,let me see;d.That is not right请问此题是考什么知识点的,选择哪一个,为什么不能选择a? 英语翻译完整句子：Clearly this is an ambitious agenda and one would not expect to find every project exhibiting all these characteristics to the same extent,if at all in some cases.翻译:if at all in some cases. Do you mind if I smoke here?_____A.not at all B.better not C.of course not D.it doesn't matterDo you mind if I smoke here?_____。Look at the sign no smokingover there Do you mind if I open the door?回答 Not at all 还是Of course not为什么答案上还有回答的都说 of course not 为什么不是 Not at all if you do it at all,do your best中文意思是什么?请问这里有将来时的含义吗?为什么if后接现在时 英语选择题,并请翻译成汉语So in the open we slept lightly, ____ when we feared that bears would nose into the tents.A. if better B. if not better C. if at all D. if not at all 请问这个at all 是啥意思,they wanted virtually any new technology to be vulnerable to legal action if it allowed any copy right infringement at all