When to use 'so that' and when 'so as to'? Isnt C the most

Question

When to use 'so that' and when 'so as to'?
Isnt C the most concise?

The ancient Romans piped hot water through the walls and under the floors  so as to warm up the rooms. 
 
A. so as to warm up the rooms 
B. and so would be able to warm up the rooms 
C. to warm the rooms up 
D. so that they could warm up the rooms 
E. in order that they would warm up the rooms

braindancer · Answer

Actually, I'd go for C. It sounds correct, it is clear, and it is by far the most straightforward.

ak_idc · Answer

"to warm up the rooms" would have been better. Still, will go with C.

karlfurt · Answer

A

A. so as to warm up the rooms 
ok - idiom
B. and so would be able to warm up the rooms 
out- wordy and tense pb
C. to warm the rooms up 
out- up separated from the verb
D. so that they could warm up the rooms 
out - wordy
E. in order that they would warm up the rooms
out - worse

ps_dahiya · Answer

This must be D.

"warm the rooms up" is not idiomatic. I have never seen split "warm up". If you go by the sound then you will definitely choose C.

quasars,

"so as to" is always wrong
correct is so........as to........

ak_idc · Answer

In D, they refers to what? Is the reference clear?

GMATT73 · Answer

Romans  did  X so that they  could  do Y~

braindancer · Answer

Nah, "they" could as well refer to "walls" or "floors". D is unclear - no-go, IMO.

ps_dahiya · Answer

I wonder wood can warm up the room, coal can warm up the room, some person can warm up the room but how a wall and a floor can warm up the room. :roll:

karlfurt · Answer

Haven't you seen roman therms?

Even in modern days you can have such systems - water circulating in tubes grabbed into the floor. As a result, the floor warms up the room and not coal or wood. Do you warm up your room by making fire right on you floor?

ps_dahiya · Answer

Sorry if offended you but if you try replacing "they" with "walls" or "floors", sentence is a total non-sense.

If water is circulating in the walls then I won't say walls are warming up the room. Instead I will say water is warming up the room.

karlfurt · Answer

No worries, I didn't feel offended.
But if I follow your reasonment, then instead of saying "my electric heater" you say that " my electricity" is warming the room?

And when the room is too warm, you would say "****, the water is too hot" instead of symply saying that your heater is too warm.

Here the water container can be the wall instead of the heater.

ps_dahiya · Answer

My dear friend it all depends on the context. IMO, all these sentences are correct.

1. All my friends have water heaters so that they  can warm up the rooms.
2. All my friends have water heaters that warm up the rooms.
3. Electricity is better than wood to warm up the rooms.

Anyway, I can not shape someone's opinion but will avoid to indulge in such conversations that are not fruitful to anybody.

ak_idc · Answer

quasars, only way out is to provide OA..to avoid these supernova explosions :lol:

ps_dahiya · Answer

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quasars · Answer

So 'so as to' should be replaced with 'to' if purpose is to show intention?

tennis1ball · Answer

if so as to is wrong, meaning only so .... as to is right, then it would be D.

When to use 'so that' and when 'so as to'? Isnt C the most

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