Please have read

[Tdol]

Originally Posted by MrPedantic

But then, without the "please":

1. Go upstairs and tidy your room!
2. *Have gone upstairs and tidied your room!

?

MrP

You're right- it doesn't work without the magic word.

[navi tasan]

Excuse me for barging in. You know me. I generally ask questions and do not post replies. This should be considered a question:

Is it the magic word, or is it the time clause?

1-Have your room cleaned up by 5 o'clock.
2-Have cleaned up your room by 5 o'clock.

PS. I'd say 'Have gone' doesn't work even with the magic word. Neither does 'have been'.
I think 'Have read it by...' insists on the perfective aspect. The reading should be over and done with by that time.

[curmudgeon]

'Have gone upstairs and tidied your room!' could be a statement rather than a demand. In written form it could be a missive left on a fridge magnet by an exasperated parent to a lazy and disorganised teenager.

[MrPedantic]

Originally Posted by navi tasan

Is it the magic word, or is it the time clause?

1-Have your room cleaned up by 5 o'clock.
2-Have cleaned up your room by 5 o'clock.

Or is #2 a causative with unusual word order? (I find I read "cleaned up" as an adjectival phrase that modifies "your room".)

MrP

[Tdol]

Ellipsis?
You must/should...

[navi tasan]

Originally Posted by MrPedantic

Or is #2 a causative with unusual word order? (I find I read "cleaned up" as an adjectival phrase that modifies "your room".)

MrP

It took me a while to figure out how you read it! It does make sense though.

A) Have ready your car at the door at five o'clock.
B)Have cleaned your car by five o'clock.

I don't know why, but I still read B as a perfective imperative, although A doesn't sound wrong to me, but just a bit unusual.

I am not a native speaker though, as you know. (I'm saying this for those who don't know it.)

[Tdol]

Originally Posted by navi tasan

I think 'Have read it by...' insists on the perfective aspect. The reading should be over and done with by that time.

I feel the same way.