Page 657 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar

wake ni wa ikanai 583
2. -nai wake ni wa ikanai is used to express the meaning that 's.o. has no
other choice but s.t.,' as shown in KS(B), Exs.(g) and (h).
3. There is no affirmative counterpart of wake ni wa ikanai.
Iri T I
(2) 4 EI ~ir/~r/~%kr~~c;, wxs.a /*ti-tb;b~t~~\
F-x
< lo
(It's a fine day, so we can play tennis.)
e elated ~x~ressions]
Regular expressions of potential, (i.e., rareru and koto ga dekiru) can
replace wake ni wa ikanai as shown in [I].

[I] a. *;%LCi%%S&d'bj @ b , 393% t2 {PK&L\ / PSZ
2 It X%&L\Io (cf. KS(A))
b. Z;kiPbB@iL2Gf;kCf2 9 3+?h.@b, %B {l%@be
(cf.
n /EGZL:MX~%~AI. EX.^)
c. 37?.tt.$;sfR-;,Tbb&DT, {%;kb+?iL /%& Z kCitt)%
3 +?A), (cf. Ex.(e))

But rareru and koto ga dekiru cannot replace wake ni wa ikanai unless an
external circumustance which blocks s.0. from doing s.t. exists, as noted
in Note 1.
(+rareru2 (DBJG: 370-73); koto ga dekiru (DBJG: 200-01))

-nai wake ni wa ikanai can be rephrased by -nakereba naranai, but
notice that the latter expresses obligation, responsibility and necessity,
whereas the former expresses the idea of 'to have no other choice but to
do s.t.'
[2] a. %JZD%BSi?@b, XRL &Cf htB& 5 &LL (cf. KS(B))