where the Japanese functional expression is in bold will be expected to be corrected as "行きましょう。", because the correct usage of Japanese verb conjugation rules in this phrase depends on the Japa-nese functional expression "ましょう (Let's)".
・BCCWJ 4 : The Balanced Corpus of Contemporary Written Japanese (BCCWJ) is a corpus created for comprehending the breadth of contemporary written Japanese.