We have agreement on the meanings of compounds of causation sumtcita.
ri'a == with cause
ri'anai == not with cause (regardless of cause)
to'eri'a == prevented by
to'eri'anai == not prevented by (despite)
However, the page includes neither examples nor detailed explanations for the cases of {to'e...}.
I think of preparing another page for that purpose, but I need your opinion especially on my understanding about {to'eki'u}, {to'emu'i}, {to'eni'i}, {to'eri'a} as well as {to'eseja'e}.
I think they are meaningful only in the scope of negation.
For example, let's examine the following sentences.
1. Lojban sentences for "I give up sleeping because of your loud noise."
1-1. {ki'u} in affirmative sentence.
{mi radycru lo nu sipna kei ki'u lo nu do cladu}
I give up sleeping because of your loud noise.
Reasonable.
1-2. {to'eki'u} in affirmative sentence.
{mi radycru lo nu sipna kei to'eki'u lo nu do cladu}
I give up sleeping prevented by your loud noise.
It may signify "Your loud noise prevents me from giving up sleeping, still 'I give up sleeping' is true."
Unusual.
2. Lojban sentences for "I don't sleep because of your loud noise."
2-1-1. {ki'u} in the scope of {naku}.
{naku mi sipna ki'u lo nu do cladu}
"I sleep because of your loud noise" is false.
It may signify:
-1. "The reason for my sleeping is not your loud noise," [1] or,
-2. "I don't sleep; if I were sleeping, the reason for my sleeping would be your loud noise."
Both interpretations are unusual.
2-1-2. {to'eki'u} in the scope of {naku}.
{naku mi sipna to'eki'u lo nu do cladu}
"I sleep prevented by your loud noise" is false.
It may signify:
-1. "Something that prevents my sleeping is not your loud noise," [2] or,
-2. "Your loud noise prevents me from sleeping, and 'I sleep' is false."
Both interpretations are reasonable.
2-2-1. {ki'u} out of the scope of {naku}.
{ki'u lo nu do cladu kei naku mi sipna}
Because of your loud noise, "I sleep" is false.
Reasonable.
2-2-2. {to'eki'u} out of the scope of {naku}.
{to'eki'u lo nu do cladu kei naku mi sipna}
Prevented by your loud noise, "I sleep" is false.
It may signify "Your loud noise prevents me from no-sleeping, still 'I don't sleep' is true."
Unusual.
Notes.
[1] The interpretation 2-1-1-1 includes the meaning of {mi sipna ki'unai lo nu do cladu}, but does not say {mi sipna} is true or not.
[2] The interpretation 2-1-2-1 includes the meaning of {mi sipna to'eki'unai lo nu do cladu}, but does not say {mi sipna} is true or not.
Conclusion.
{ki'u} is reasonable in affirmative sentence or out of the scope of negation; it may allow unusual interpretations in the scope of negation.
{to'eki'u} is reasonable in the scope of negation; it may allow unusual interpretations in affirmative sentence or out of the scope of negation.
Supposing my understanding is correct, we should be careful in reforming 2-1-2 {naku X to'eki'u lo nu Y} into the forms with {i to'eki'u bo} and {to'eki'u gi ... gi}: {zo'u} is indispensable for {i to'eki'u bo} in order to let the scope of {naku} span over {to'eki'u}.
Forms corresponding to each other:
naku X to'eki'u lo nu Y
naku zo'u X .i to'eki'u bo Y
naku to'eki'u gi Y gi X
Example:
naku mi sipna to'eki'u lo nu do cladu
.i
naku zo'u mi sipna .i to'eki'u bo do cladu
.i
naku to'eki'u gi do cladu gi mi sipna
re'i