1 Jack and I are flatmates. 2 My granddad corresponds with his sea mates. 3 Were we classmates in 1978? 4 She s

1. "Jack and I are flatmates" means that Jack and the person speaking live together in the same flat or apartment. This shows that they share a living space and possibly split the rent and household responsibilities. The use of the word "flatmates" implies that they are not in a romantic relationship but rather share a living arrangement as friends or acquaintances.

2. "My granddad corresponds with his sea mates" means that the person"s grandfather stays in touch with his friends from the sea. The word "corresponds" indicates that they communicate through letters, emails, or other means of written communication. The term "sea mates" suggests that these friends are people with whom the grandfather has a connection from his time at sea, possibly through his work or a shared interest.

3. "Were we classmates in 1978?" implies that the speaker is questioning whether they and the person they are referring to were in the same class together in 1978. The use of the word "classmates" suggests that they are asking about a shared educational experience, such as attending the same school and being in the same class during that particular year.

4. "She"s not a friend, just a workmate" indicates that the person being spoken about is not considered a friend but rather a colleague or someone they work with. The use of the word "workmate" implies that they have a professional relationship and interact primarily within the context of their work. This suggests that their relationship is limited to the confines of their workplace and may not extend beyond it.