I can encounter you can encounter he can encounter we can encounter you can encounter they can encounter
V-ing form
I can be encountering you can be encountering he can be encountering we can be encountering you can be encountering they can be encountering
Perfect
I can have encountered you can have encountered he can have encountered we can have encountered you can have encountered they can have encountered
V-ing perfect
I can have been encountering you can have been encountering he can have been encountering we can have been encountering you can have been encountering they can have been encountering
Negation
Simple form
I cannot encounter you cannot encounter he cannot encounter we cannot encounter you cannot encounter they cannot encounter
V-ing form
I cannot be encountering you cannot be encountering he cannot be encountering we cannot be encountering you cannot be encountering they cannot be encountering
Perfect
I cannot have encountered you cannot have encountered he cannot have encountered we cannot have encountered you cannot have encountered they cannot have encountered
V-ing perfect
I cannot have been encountering you cannot have been encountering he cannot have been encountering we cannot have been encountering you cannot have been encountering they cannot have been encountering
Interrogative form
Simple form
can I encounter? can you encounter? can he encounter? can we encounter? can you encounter? can they encounter?
V-ing form
can I be encountering? can you be encountering? can he be encountering? can we be encountering? can you be encountering? can they be encountering?
Perfect
can I have encountered? can you have encountered? can he have encountered? can we have encountered? can you have encountered? can they have encountered?
V-ing perfect
can I have been encountering? can you have been encountering? can he have been encountering? can we have been encountering? can you have been encountering? can they have been encountering?
Interro-negative form
Simple form
can I not encounter? can you not encounter? can he not encounter? can we not encounter? can you not encounter? can they not encounter?
V-ing form
can I not be encountering? can you not be encountering? can he not be encountering? can we not be encountering? can you not be encountering? can they not be encountering?
Perfect
can I not have encountered? can you not have encountered? can he not have encountered? can we not have encountered? can you not have encountered? can they not have encountered?
V-ing perfect
can I not have been encountering? can you not have been encountering? can he not have been encountering? can we not have been encountering? can you not have been encountering? can they not have been encountering?