This question evolved from a thread I created here yesterday (Past simple vs used to vs would). But as some of my previous doubts were resolved, another arose, and for the sake of brevity, and because I hoped this might draw in some new people, I decided it'd be best to write a separate post.
I'm having a bit of trouble telling the difference between using the past simple tense and "would" form in sentences that describe past repeated/habitual actions. The main troubling issue for me is the fact that it's sometimes pretty vague whether the speaker implies single or repeated action if they use solely the past tense. Does it always depend on the context of the whole statement?
Is there a situation when one of these forms is preferred to another? Are there even any rules regarding their use, or are they mostly interchangable?
For example, this quotation from The Clockwork Orange incorporates both forms in separate, consecutive utterances:
The Korova milkbar sold milk-plus, milk plus vellocet or synthemesc or drencrom, which is what we were drinking. This would sharpen you up and make you ready for a bit of the old ultraviolence.
Still, a short note about Ted Bundy's Modus Operandi seems to limit its structure solely to "would" forms.
Sometimes, Bundy would use a fake cast to play on a potential victim's sympathy. He would ask them for assistance of some kind, such as helping him put something in his car or asking for directions.
On the other hand though, the Wikipedia article about this murderer again utilizes both forms:
He would employ various ruses designed to lure his victim to the vicinity of his vehicle where he had pre-positioned a weapon, usually a crowbar. In many cases he wore a plaster cast on one leg or a sling on one arm, and sometimes hobbled on crutches, then requested assistance in carrying something to his vehicle.
To top it all, the two following sentences sound to my ear equally good no matter which form I choose and I really can't tell if one's better than another.
- The Aztecs used/would use shells and jewels to create dyes.
- He only spoke of it/would only speak of it when he was under a lot of pressure.
I find the entire issue really twisted and tangled, and I really hope someone can provide an in-depth explanation.
Best Answer
There are actually two different uses going on here. I think the "would" in "This would sharpen you up" is used to transform the statement into a conditional or hypothetical. For example, "That painting would look nice over the fireplace." In this case the implied condition under which "sharpening up" will occur is the drinking the milk-plus.
In the Bundy examples, "would" is preferred because they are generalized statements about his tactics rather than a recital of his crimes. The same generalization is accomplished without the use of "would" by starting a sentence with "in many cases," although the meaning of the sentence would not significantly change had the author chosen to include the word "would".
The last two examples are perfectly valid constructions either way, but you might prefer one over the other depending on context. The meanings are only very subtly different.
The above sentence simply states a historical fact about what the Aztecs did. It works well in multiple contexts.
Note that in Example A, "would use" would not be appropriate. However, in Example B, "used" and "would use" are interchangeable without losing the essential meaning.
The above sentence states the same historical fact, but generalizes it as a habitual aspect in past time. As an example, it might be used when describing a scene or trying build a sense of atmosphere. The "would" might also be used for emphasis or contrast.
Again, in the Example D above, you could substitute "used" for "would use" without greatly affecting the meaning. However, "would use" is favored by the author to call attention to the abnormality.
Edit for more examples:
Remember that "would" in this usage describes habitual, or typical behavior.
I'm going to drop the "only" from your final example, because the modifier makes the two statements roughly equivalent. There is more contrast without it.
This statement means he spoke of it at least one time, and he was under pressure at the time that he spoke of it.
It can be considered a discrete event, solidly in the past.
This statement means that whenever he was under pressure, he spoke of it. It suggests that this occurred more than once. The central meaning conveyed is not the past event(s), but the past behavior: activity that was typical, or which could be generalized. This is why we call it "habitual."
The behavior is typical, such that if you traveled back to the timeframe being discussed, the occurrence "would" happen again (conditional/future tense) if the correct conditions were supplied.
Here are a few more examples that may shed some light on the different scenarios:
Simple Past for Discrete event(s):
Simple Past with a frequency for Habitual Behavior:
Would for Habitual Behavior:
Would for Contrasting Habitual Behavior:
Would for Habitual Past Tense Conditional:
And for the sake of completeness...
Would for Present Tense Conditional:
Would for Discrete Past Tense Conditional: