1. It is ten days seen I last saw Lan
The last time I saw Lan was ten days ago
I haven't seen Lan for ten days
2. It is a month since she last phoned me
The last time she phoned me was a month ago
She hasn't phoned me for a month (chứ ko phải haven't nhé)
3. It is a year since they last ate fish
The last time they ate fish was a year ago
They haven't eaten fish for a year
4. It is eight months since it last rained
The last time it rained was eight months ago
It hasn't rained for eight months
5. It is six weeks since it last snowed
The last time it snowed was six weeks ago
It hasn't snowed for six weeks