Take the 2-minute tour ×
Linguistics Stack Exchange is a question and answer site for professional linguists and others with an interest in linguistic research and theory. It's 100% free, no registration required.

I'm trying to write a syntax tree structure of a sentence with the word 'should'. It's a long sentence, so to simply, let's take this sentence instead:

I should play the piano.

I'm not sure whether 'should' is the tense marker in the sentence. To demonstrate (surface structure):

enter image description here

My argument is that in the sentence I played the piano, it's clear that the T has merged with the V.... Thanks!

share|improve this question
Ask your teacher what they want you to call it; should is only a tense marker if your teacher says it is. For everybody else, should is a modal auxiliary verb, which, like all modals, is tenseless (though it is always the first auxiliary and thus should have tense if there were any) and takes an infinitive complement with Equi. –  jlawler Feb 19 '13 at 22:27
Thank you very much. –  pauliwago Feb 19 '13 at 23:04
add comment

1 Answer

up vote 2 down vote accepted

According to what I have learnt, I wouldn't say that should is a tense, but I would say that it carries a past tense inflection. And about your idea of T merging with V, I would suggest considering the following. Basically, there is a hypothesis saying that TPs are headed by a T constituent, either overt or null. Merging occurs, but that wouldn't fully explain what happens to T. In your fist example, the head of T is the modal auxiliary verb, but in the finite clause, the T would have a null phonetic spell out of a tense affix which also carries person and number features. The idea is that heads cannot be empty, and in this case the tense affix undergoes a morphological operation called affix hopping. Thus, in the sentence I played the piano, the T head would be something like Tense-3SgPr and it would be lowered onto the head V play. The derived structure would be [play+Affix-3SgPr], which in turn would be spelled out as played. See Radford (2006) for a more detailed explanation.

share|improve this answer
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.