At a more advanced level of English, “you must…..” or “you’ll have to….” can be used to give polite but vague invitations. Specific times are avoided with this usage as they could make the invitation sound like an obligation.
For example:
We must catch up soon, yeah. Sweet!
The English Grammar Profile, B1 point 112 in the category of MODALITY is defined as:
‘must’ to make invitations
Locating ‘invitations’ requires manual searching. We can only start with a simple cluster search in iWeb for:
you must come * *
On the left appear to be invitations.
1 YOU MUST COME TO THE 220
2 YOU MUST COME UP WITH 143
3 YOU MUST COME TO A 93
4 YOU MUST COME TO TERMS 53
5 YOU MUST COME INTO THE 50
6 YOU MUST COME IN PERSON 44
7 YOU MUST COME BACK TO 39
8 YOU MUST COME WITH ME 38
9 YOU MUST COME AND SEE 33
10 YOU MUST COME FROM A 28
11 YOU MUST COME IN TO 25
12 YOU MUST COME TO ME 24
13 YOU MUST COME TO MY 18
14 YOU MUST COME TO OUR 17
15 YOU MUST COME TO GRIPS 13
16 YOU MUST COME IN AND 13
17 YOU MUST COME IN CONTACT 12
18 YOU MUST COME TO UNDERSTAND 12
19 YOU MUST COME WITH US 11
For example:
Two weeks later, he called me and invited me to a birthday party and he said you must come to celebrate with us.
PELIC STUDENT: Arabic, Male, Level 5, Grammar Class.