New answers tagged auxiliary-verbs
We can both use need not and don't need to. However, if needn't is followed by an object, we must use don't need. For example : You don't need your coat. It's not cold outside. "Coat" is an object, so it is wrong to say ,"You needn't your coat".
The ‘rule’ with Wh-questions is a bit more complicated than that. If a fronted Wh-word represents the subject of the question, neither inversion nor Do-support is required. Who is the man with the shovel? <<< Bob is the man with the shovel. What keeps him going? <<< Whisky keeps him going. If a fronted Wh-word does not represent ...
You should consider that 'keeps' is acting as an auxiliary verb in this sentence and is being used to form the present progressive tense in place of the verb 'to be,' so "What keeps him going" has the correct structure for a progressive tense question. I can't think of any other examples of this kind of substitution in the progressive tense, but we can ...
If who is the subject of the question, no auxiliary is needed. Who helped you? If there is a different subject, then the auxiliary is needed: Who(m) did you help? The same applies to what: What keeps him going? What does he keep?
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