1.   require
    2.   are required
    3.   may require
    4.   requires
    5.   requiring
    1.   not get
    2.   does not get
    3.   cannot get
    4.   are not getting
    5.   have not got
    1.   turn
    2.   must turn
    3.   must be turning
    4.   must be turned
    5.   have turned
    1.   are turned
    2.   can turn
    3.   can be turning
    4.   can be turned
    5.   can have turned
    1.   is containing
    2.   contains
    3.   is contained
    4.   will be contained
    5.   contain
    1.   use
    2.   can use
    3.   can be used
    4.   can be using
    5.   have used
    1.   excrete
    2.   excretes
    3.   has excreted
    4.   is excreted
    5.   is excreting
    1.   puts
    2.   is putting
    3.   put
    4.   is put
    5.   has put