1.否：Tim can not climb the tree.
疑：Can Tim climb tree?
2.否：He does not like beef.
疑：Does he like beef?
3.否：They do not like tea.
疑：Do they like tea?
4.否She does not want suger.
疑：Does she want suger?
5.否：There is not a cup on the table.
疑：Is there a cup on the table?
6.否：He is not climbing the tree.
疑：Is he climbing the tree?