01 You could/would have [achieved sth] if you had [done sth] instead of [doing sth].
Honestly, you could have finished the report by now if you had just started writing instead of whining about how tough it is.
说实话，如果你刚刚就开始写，而不是一直抱怨有多难写，现在早就写完了。
whine /waɪn/ 动词，表示to complain in a sad annoying voice about something，抱怨，发牢骚。
02 You could/would have [achieved sth] if you hadn't [done sth].
You could've learned the pronunciation and some basic vocabulary by now if you hadn't been asking around online if it’s too late to learn a new language at 40. It’s never too late.
你老在网上到处提问40岁学习一门新语言还来不来得及，有那时间，都能学会发音和一些基础词汇了。学语言什么时候开始都不会太晚。
03 All this time you/you've spent [doing sth] could've been used to [do sth].
All this time you/you've spent worrying about the problem could’ve been used to actually solve it.
你用来担心问题的那些时间本来可以用来解决问题。
you've spent和you spent的区别主要是you've spent有“到现在还在为问题苦恼”的意思。
04 If you had spent as much time [doing sth] as you did [doing sth], you would have [achieved sth].
If you had spent as much time reading as you did talking about how long that book is, you'd have finished it by now.
如果你花在阅读上的时间和你一直说那本书很长的时间一样多，你现在早就读完了。
05 With all the time you/you've spent [doing sth], you could have [achieved sth].
With all the time you spent chatting with friends and putting it off, you could've finished your report by now.
如果你把和朋友聊天和拖延的那些时间用在写报告上，现在早就写完了。
put sth. off表示推迟做某事，拖延。
06 In the time it took you to [do sth], you could have [done sth].
In the time it took you to discuss what to eat for dinner, you could've already cooked something with what you have in the fridge.
你们讨论晚饭吃什么讨论这么久，有这时间，都能用冰箱里的东西做顿饭了。
这一期比较适合做仿写，大家要不试试下边这个句子怎么说吧。
发这么长的帖子来提问，有这时间，自己查一下就知道答案了。
发帖：make a post；自己查：do your own research
文本左滑查看参考答案。除了参考答案，还有其他说法。
If you had spent as much time doing your own research as you did making this post, you would've found out the answer already.
In the time it took you to make this post, you could've done your own research and found out the answer already.
往期推荐：
资源 | 分享一个美音生活故事播客，有文本
“失去了才珍惜”英语怎么说？
推文说明：
这系列推文主要分享那些中文里常说、换成英语就不太会讲的话。每天早晨8点更新。
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