The useful reordering pattern learned through this example is: Ich kann umstellen → I can rearrange which is memorized through the operation sequence: Generate(Ich, I) -Generate(kann, can) -Insert Gap -Generate(umstellen, rearrange) It can generalize to the test sentence shown in Figure 1(a).
it fails to generalize to the sentences in Figure 1(b) and (c) although the underlying reordering pattern is the same.