I am interested in morphology, syntax (mainly), and semantics. I am interested in linguistic analyses, in formalisms that can be used to describe them, and in processing models . Much of my work (including my thesis on German syntax) is presented in the framework of Tree Adjoining Grammar (TAG), or at least is heavily influenced by TAG. TAG was developed by Aravind Joshi starting in the 1980s. One of the many interesting properties of TAG is that it bridges phrase structure and dependency representations of syntax.

I have worked on both natural language generation and natural language understanding.

I am also interested in how language is used in context, for example in email conversations or on Twitter. I have worked on how discourse participants signal beliefs and sentiments.

I have worked on many different languages, including Arabic, English, German, and Hindi.