Żeby położyć szczególny nacisk na pewne informacje, używamy słów takich jak however, whoever, whatever w znaczeniu “jakkolwiek”, “ktokolwiek”, “cokolwiek” itp. Przykłady:

However hard he tried, he couldn't solve the puzzle.

Whoever arrives first should reserve a table for the group.

Whatever she does, she always wins. 

Which i whom możemy użyć w zdaniach względnych w pewnych wyrażeniach, takich jak: many of whom, some of which, without whose, as a result of which. Przykłady:

The garden was filled with a variety of flowers. Some of them bloomed in vibrant shades of red and purple.
The garden was filled with a variety of flowers, some of which bloomed in vibrant shades of red and purple.

The company upgraded its software systems. As a result, productivity increased significantly.
The company upgraded its software systems, as a result of which productivity increased significantly.

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1. Whenever