构成语法正确（但并不一定有意义）的句子，只要该词既是一个有生命的物体的复数形式，同时还能当作及物动词即可。这些词汇包括、、、、、等。另外还有一些类似的表达，如"James while John had had had had had had had had had had had a better effect on the teacher"。