Question sentences

At the age of 2 years and 10 months, Tom is already experimenting with question sentences. There are three forms of Wh-questions he uses most of the time. Give the (flat) tree structure of those three forms. Ignore AP's and use the symbol 'x' where Tom leaves out a constituent. For example:

syntax tree
Q
Q
Q

Do the same, but now for the 3-year-old Tom. Do you see any differences?

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Q
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