Sentence

Because I had to continuously work on my start-up.

Yes, it means that. "continually" doesn't seem the right word though. Also, I question whether something is still a "start-up" after ten years. "because my business needs my constant attention" may be better.

AnonymousBecause I had to continuously work on my start-up.

That is not the right tense.

NewguestI haven’t taken a vacation in ten years because I need to continually work on my start-up.

It's grammatically correct, but let me offer this instead:

I haven't taken a vacation in ten years because I've spent all my time working on my start-up.

NewguestDoes it mean that the person who wrote it hasn't been on vacation fo

Hi. What if I wrote:

I haven't taken a vacation FOR ten years because I've spent all my time working on my start-up.

--- Would FOR change the meaning?

NewguestWould FOR change the meaning?

No.

NewguestWould FOR change the meaning?

No, not in this sentence, but in time expressions "in" and "for" can be different.

Suppose it is now one o'clock.

I'm going to swim for a half hour this afternoon. (It could be from 2:30 to 3; it could be from 3 to 3:30; it could be 3:40 to 4:10; ...)
I'm going to swim in

I'm not sure I understand the 2nd example with "in". Is the meaning the same as in "I'm leaving in a half an hour"?

By the way, are all these OK:

in a half hour
in a half an hour
in half an hour

NewguestI'm not sure I understand the 2nd example with "in". Is the meaning the same as in "I'm leaving in a half an hour"?

The function of "in" is the same, yes.

Newguestin a half hour in a half an hour in half an hour

All fine. Different ways of saying the same thing. I think I prefer "in half an hour" even though I didn