Some researchers suggest the problem isn't grammar, but .
The second gap is inside an "island," but the first "licit" gap makes the whole sentence feel okay to a native speaker. Islands
Many generative grammarians argue that islands are a result of the of human language. Some researchers suggest the problem isn't grammar, but
Not all subject islands are equally strong. Some violations become acceptable if they are "saved" by a second gap in the sentence, known as a . Islands
A occurs when the grammatical subject of a sentence acts as one of these barriers. In English, you can usually extract a word from the object of a sentence, but doing the same to the subject results in an ill-formed "island violation".