Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could arrive arrive you could arrive arrive she could arrive arrive we could arrive arrive you could arrive arrive they could arrive arrive
V-ing form
I could be arrive arriving you could be arrive arriving she could be arrive arriving we could be arrive arriving you could be arrive arriving they could be arrive arriving
Perfect
I could have arrive arrived you could have arrive arrived she could have arrive arrived we could have arrive arrived you could have arrive arrived they could have arrive arrived
V-ing perfect
I could have been arrive arriving you could have been arrive arriving she could have been arrive arriving we could have been arrive arriving you could have been arrive arriving they could have been arrive arriving
Negation
Simple form
I couldn't arrive arrive you couldn't arrive arrive she couldn't arrive arrive we couldn't arrive arrive you couldn't arrive arrive they couldn't arrive arrive
V-ing form
I couldn't be arrive arriving you couldn't be arrive arriving she couldn't be arrive arriving we couldn't be arrive arriving you couldn't be arrive arriving they couldn't be arrive arriving
Perfect
I couldn't have arrive arrived you couldn't have arrive arrived she couldn't have arrive arrived we couldn't have arrive arrived you couldn't have arrive arrived they couldn't have arrive arrived
V-ing perfect
I couldn't have been arrive arriving you couldn't have been arrive arriving she couldn't have been arrive arriving we couldn't have been arrive arriving you couldn't have been arrive arriving they couldn't have been arrive arriving
Interrogative form
Simple form
could I arrive arrive? could you arrive arrive? could she arrive arrive? could we arrive arrive? could you arrive arrive? could they arrive arrive?
V-ing form
could I be arrive arriving? could you be arrive arriving? could she be arrive arriving? could we be arrive arriving? could you be arrive arriving? could they be arrive arriving?
Perfect
could I have arrive arrived? could you have arrive arrived? could she have arrive arrived? could we have arrive arrived? could you have arrive arrived? could they have arrive arrived?
V-ing perfect
could I have been arrive arriving? could you have been arrive arriving? could she have been arrive arriving? could we have been arrive arriving? could you have been arrive arriving? could they have been arrive arriving?
Interro-negative form
Simple form
couldn't I arrive arrive? couldn't you arrive arrive? couldn't she arrive arrive? couldn't we arrive arrive? couldn't you arrive arrive? couldn't they arrive arrive?
V-ing form
couldn't I be arrive arriving? couldn't you be arrive arriving? couldn't she be arrive arriving? couldn't we be arrive arriving? couldn't you be arrive arriving? couldn't they be arrive arriving?
Perfect
couldn't I have arrive arrived? couldn't you have arrive arrived? couldn't she have arrive arrived? couldn't we have arrive arrived? couldn't you have arrive arrived? couldn't they have arrive arrived?
V-ing perfect
couldn't I have been arrive arriving? couldn't you have been arrive arriving? couldn't she have been arrive arriving? couldn't we have been arrive arriving? couldn't you have been arrive arriving? couldn't they have been arrive arriving?