8.15 events in sequence
You can also use 'when', 'after', or 'once' to talk about one event happening immediately after another.
If you want to say how long one event happened after another, you put a noun group such as 'two days' or 'three years' in front of 'after'.
'As soon as', 'directly', 'immediately', 'the moment', 'the minute', and 'the instant' are all used to talk about one event happening a very short time after another.
8.16
When you want to say that something happened, happens, or will happen at an earlier time than something else, you use 'before'.
If you want to say how long one event happened before another, you put a noun group such as 'three weeks' or 'a short time' in front of 'before'.
8.17
When you are telling a story, you sometimes want to say what was happening when a particular event occurred. You first say what was happening, then add a clause beginning with 'when' in which you mention the event.
If you want to say that one event happened a very short time after another, you use a clause in the past perfect tense, followed by a time clause in the simple past tense. After 'had' in the first clause, you put 'no sooner' or 'hardly'.
When you use 'no sooner', the time clause begins with 'than'.
When you use 'hardly', the time clause begins with 'when' or 'before'.
'No sooner' or 'hardly' is often put at the beginning of the first clause, followed by 'had' and the subject.
8.18
When something is the case because of a new situation, you can say what is the case and then add a subordinate clause saying what the new situation is. The subordinate clause begins with 'now' or 'now that'.