Gradient optionality in L2 acquisition at the syntax-discourse interface: Evidence from inversion in advanced and near-native English

•The syntax-discourse interface is an area of permanent optionality in L2 acquisition.•Optionality at this interface is gradient, ranging from weak to strong.•Optionality at this interface is modulated by, at least, 4 interacting factors. This article investigates the acquisition of two structures i...

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