"Walk through the tunnel" means to enter the tunnel on one end and emerge out the other end.
"Walk across the tunnel" could mean the same thing, but only if the context establishes that. It could also mean to enter the tunnel through a side entrance, and exit out another side entrance (i.e. the short way, not the long way); or it could mean to go across the top of the tunnel (e.g. if it's underground and the road goes over it); or variations on those themes.
In general, "through" implies entering the middle of something and then going out the other side, whereas "across" implies crossing the middle, but not necessarily going in the thing you're crossing.
There seems to be some regional variation on this topic, so I will report from my AmE perspective.
In your particular example, either option would be understood to mean the same thing: the speaker works at some point during the course of each weekday (Monday, Tuesday, Wednesday, Thursday, Friday).
“From” would probably be omitted in either case as it is not needed to indicate a day range.
Generally speaking, I was always taught to indicate inclusive ranges with the word “through”. This generally has more application in studying mathematics, but could have an impact such as the following:
- Read up through chapter 3.
- Read up to chapter 3.
Receiving instruction #1 with no further clarification, I would read chapters 1, 2, and 3. Instruction #2, on the other hand, presents a quandary. It seems most likely that I’m supposed to read chapters 1 and 2, stopping when I reach the start of chapter 3, and that’s indeed what I would think if I were given no other hint as to the instructor’s wishes.
As you can see there’s a lot of iffiness here, so even among native speakers there is occasionally confusion and/or clarification. A misunderstanding such as the following would not be unheard of:
A: We’ll be on the boat Wednesday to Saturday next week.
B: So you’ll be back on land that Saturday?
A: No, we dock Sunday morning and we’re spending Sunday on the road.
As always, consider your audience and the context. Working those five days is such a common occurrence that neither word is likely to confuse anyone as to what you mean. In other cases, you may wish to add “inclusive” after the range to clarify that the whole of the end-limit you’ve named should be considered part of the deal.
Best Answer
In most contexts, "through" and "throughout" can mean the same thing - that something occurred constantly, or regularly across the entire period stated, although you can also say "all through" which specifically means that it was constant. "During" means that something occurred at some given point in the period stated.
For example:
... this would mean that the burglar alarm went off at some point during the night.
... this could either mean that the alarm rang constantly, the whole night; or that it repeatedly went off during the night.
... this would mean it rang for the entire night.
However, your specific examples about sleep are a little different because you are saying that you didn't sleep. Because you are speaking in the negative, it can sound a bit weird to say that something didn't happen constantly.
Another reason that your example is somewhat different is because "not sleeping" does not always mean literally no sleep - it can refer to poor sleep, broken sleep, or very little sleep.
This doesn't sound particularly idiomatic. It sounds like you are saying that you slept some other time, not during the night. It doesn't really fit this context.
"Through the night" is idiomatic in itself and means that you slept from beginning to end. Parents say that babies "sleep through" to mean they have passed the phase where they frequently wake up. This phrase therefore suggests that you woke up at some point, possibly more than once.
Again, this doesn't sound particularly idiomatic, because it is saying something didn't happen constantly. I wouldn't say it.
If you intend to say that you did not sleep at all, I would suggest as alternatives: