First, let’s define what an apartheid is. It’s a system dealing with institutionalized racial segregation and discrimination in South African between 1948 and 1991. So, basically, in Nadine Gorimer’s essay, it talks about stories during that time which could be in any form such as aversion, unreasonable apartheid laws, and most importantly it brings a message for the administrating body on how the people want to end such undertaking.
Your sentence could be like this
"the sweet scent of newly-mown grass"
Hi !
to come = infinitive
come = present
came = past
come = past participle (I had come)
to come is an irregular verb : come / came / come
hope I helped