Many generative grammarians argue that islands are a result of the of human language.

"*Who did [a picture of ___] hang on the wall?" (The phrase is the subject). Why Do Islands Exist?

The second gap is inside an "island," but the first "licit" gap makes the whole sentence feel okay to a native speaker.

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".

"Which book did you file ___ [without reading ___]?"

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Islands -

Many generative grammarians argue that islands are a result of the of human language.

"*Who did [a picture of ___] hang on the wall?" (The phrase is the subject). Why Do Islands Exist?

The second gap is inside an "island," but the first "licit" gap makes the whole sentence feel okay to a native speaker.

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".

"Which book did you file ___ [without reading ___]?"