SimilarityRank
if_necessary 0.876 5977
if_require 0.804 15317
when_necessary 0.763 15198
if_necessary_) 0.711 70063
as_necessary 0.706 12488
where_necessary 0.657 20740
if_request 0.650 44392
if_desire 0.622 20726
as_needed 0.610 85522
if_appropriate 0.603 33500
when_appropriate 0.597 27857
any_necessary 0.580 77666
upon_request 0.560 17938
if_you_wish 0.550 24722
if_available 0.545 31638
as_appropriate 0.537 11431
if_possible 0.536 7173
where_appropriate 0.528 13733
if_you_need_to 0.520 24180
may_need 0.517 27423
may_be_necessary 0.498 44494
when_possible 0.498 20080
optionally 0.493 18069
if_you_need 0.492 16156
as_a_last_resort 0.482 61874