pretty
/prĭt′ē/
adjective
- Pleasing or attractive in a graceful or delicate way. synonym: beautiful.
- Clever; adroit. a pretty maneuver.
- Very bad; terrible. in a pretty predicament; a situation that has reached a pretty pass.
Someone said “I pretty liked it.” How do I explain why that’s wrong? You can say I really liked but not pretty liked or very liked. How do I do explain this to a student?
It depends on intonation. With a certain, emphatic intonation, Tom looks pretty tired can mean "Tom looks very tired; indeed, his level of tiredness is remarkable." With ordinary intonation, it just means "Tom is moderately tired—tired enough to matter, but his level of tiredness is not especially remarkable."
The emphatic intonation that I have in mind drags out each syllable of pretty to an equally long length, about as long as the word tired. The pitches go something like E D C, like "Three blind mice". Of course, there are many other kinds of intonations and emphasis that a person could give the words, suggesting many different kinds of tiredness, and there is no precise, standardized code. You just improvise.
In written text it isn't easy to tell whether the intended implication of degree adverbs such as pretty or quite or rather is "very" or "a bit". It can only really be guessed from the context. However, in real speech our interpretation of these adverbs depends on the stress we use.
In examples like the Original Poster's, these adverbs are used to modify adjectives. For example:
- pretty good
- quite interesting
- rather long
- fairly thorough
These adverbs have a meaning of "X, but not very, very X".
There are two parts of this meaning that we can emphasise: the fact that something is X - or the fact that it's not very, very X.
If we stress the adverb, it emphasises that it wasn't very, very good, very interesting, very short, or very thorough:
- It was pretty good.
- It was quite interesting.
- It was rather long.
- It was fairly thorough.
However, if we stress the adjective, then it emphasises that it was, indeed, X:
- It was pretty good.
- It was quite interesting.
- It was rather long.
- It was fairly thorough.
In these examples, because we hear the adjective as stressed, our interpretation of these degree adverbs is something similar to very.
Hope this is helpful!