Needed
This document provides basic information needed in order to configure your router for routing IP, such as how addresses are broken down and how subnetting works. You learn how to assign each interface on the router an IP address with a unique subnet. There are examples included in order to help tie everything togetherhttp://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html
What is the grammatical form and function of the "needed" here and how do we know when to use this form?
Top answer
This is a matter of omitting "which is" at the beginning of a relative clause. basic information (which is) needed in order to ... You can use this abbreviated construction whenever you have a relative clause that starts with "which" or "who" followed by a form of be ( am, is, are, was, were ) and a participle.
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This is a matter of omitting "which is" at the beginning of a relative clause.
... basic information (which is) needed in order to ...
You can use this abbreviated construction whenever you have a relative clause that starts with "which" or "who" followed by a form of be (am, is, are, was, were) and a participle.
the man who is walking into the bank
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