would
"Would" is one of the most useful and flexible words in English. It is a modal verb — a special helper verb — and it has about four core uses that you will encounter constantly. It deals with things that are not certain, not real, or that happened repeatedly in the past. Once you understand its main patterns, a lot of English grammar will start to click.
When you report what someone said or thought in the past about the future, 'will' changes to 'would'. Imagine someone said 'I will call you.' Later, you tell a friend: 'She said she would call me.' The meaning is the same — you are just shifting the time frame back.
everyday language, grammar · Modern, widely used