a big if
口语常用，前面多与 that's 连用，表示某件事能否实现还很悬。
She says the project will be finished by June, but that's a big if.
她说这个项目六月前会完成，但那是个很大的未知数。
假设，条件
条件；[计] DOS批处理命令:根据所测试的条件决定是否执行另一条命令
a condition or supposition, often with uncertainty or qualification
如果；是否；条件；[计] DOS批处理命令:根据所测试的条件决定是否执行另一条命令
conj. In case that; granting, allowing, or supposing that; --；introducing a condition or supposition.；conj. Whether; -- in dependent questions.
The contract has too many ifs, making it difficult to approve.
这份协议有太多条件，难以批准。
用法提示：句中'ifs'作为名词复数形式，表示'条件'。
There is an if about the success of this method.
这个方法是否成功存在一个疑问。
用法提示：句中'if'作为名词，表示'疑问、不确定'。
I don't like all the ifs in your proposal.
我不喜欢你提案中所有的条件。
用法提示：句中'ifs'作为名词复数形式，表示'条件'。
口语常用，前面多与 that's 连用，表示某件事能否实现还很悬。
She says the project will be finished by June, but that's a big if.
她说这个项目六月前会完成，但那是个很大的未知数。
固定说法，用于命令或要求之后，表示不容许任何借口或异议。
Clean your room before dinner — no ifs, ands, or buts.
晚饭前把你的房间收拾好——不许讨价还价。
if 作名词时可数，用复数 ifs 指尚未确定的条件或疑问。
There are still a few ifs before the deal can be signed.
协议签署之前还有几个不确定因素。
grammar · medium
易错句子That's still big if.
正确表达That's still a big if.
if 作名词表示“条件、未知因素”时是可数名词，单数形式前必须有冠词，因为汉语名词前没有冠词系统，学习者容易漏掉 a。
grammar · medium
易错句子There are too many if in this plan.
正确表达There are too many ifs in this plan.
if 表示“条件、不确定之处”时是可数名词，many 后要用复数形式 ifs；汉语名词没有复数词尾，学习者容易保留原形。
“if”作名词指不确定的条件或疑问，多用于“a big if”“no ifs”等口语搭配；“condition”是通用名词，指明确的要求或状态，正式或日常语境均可。
“stipulation”是正式用语，尤指合同或协议中的明确规定；“if”作名词不用于正式条款，而指口语中不确定的条件或疑问。
“doubt”是表示“疑问、不确定”的通用名词；“if”作名词表示“不确定的因素”，多用于“a big if”等固定表达，且带口语色彩。
Choose the next layer that will help you use if with more confidence.
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