Halliday & Matthiessen (1999: 170):
…where the relation is enhancing, the Range specifies some entity that delimits the scope of the Process; here, therefore, there is often an agnate form where the scope is construed as a circumstantial element. For example:
Process
+ Range
|
Process
+ circumstantial element
|
|
doing
|
cross
the street
climb
the mountain
enter
an agreement
|
cross
over the street
climb
up the the mountain
enter
into an agreement
|
being
|
be
a witness
become
a prince
|
act
as a witness
turn
into a prince
|