Both "would" and "should" are modal verbs so is there some fundamental reason why one can be contracted and the other cannot?
orthography - Contractions: Are “I would’ve” and “I’d have” both equally permissible? - English Language & Usage Stack Exchange
Is it'd (it would) a common contraction?
Question: I am having a hard time trying to figure out if “I'ld“ (for “I would”) is a correct word/contraction or not. I really, sincerely believe, that “I’d” is the only correct form and spelling, isn’t it?
Could "I'd" be used as a contraction of "I had"?
What is the difference between an abbreviation and a contraction?
What are contractions?
When should you use contractions?
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To my non-native ear, it sounds awkward to pronounce t and d together. Do you natives agree? Should I use it here?
Can you imagine? It would be hilarious.
Can you imagine? It'd be hilarious.
I only know ONE person, that uses the contraction “I’ld”, and she believes that this is an okay form to use. I really want to prove my friend wrong.
"I'd been watching a movie before my friends arrived" - is it possible to say that or it would be interpreted as "I would been watching a movie" (although it doesn't really make sense)?
I would must be followed by an infinitive without to ( or perfect infinitive as in I would have gone). I had must be followed either by an object (a noun phrase, e.g. I had a little lamb, in which meaning it is rarely contracted) or by a verb's past participle. So it's (almost) always possible to distinguish between them by analyzing the words that follow.
Examples:
I'd go. (go = infinitive => 'd = would)
I'd had. (had = participle => 'd = had)
The only ambiguous case is when the verb's infinitive coincides with its participle.
I'd put. (could be would or had)
But these cases are rare and the meaning can be deduced if more context is provided
It will usually be clear from the context. For example, in the sentence I’d like to have a million dollars, I’d can only be a contraction of I would. By contrast, in I’d been there some time, it can only be a contraction of I had.