I could achieve you could achieve he could achieve we could achieve you could achieve they could achieve
Forma com V-ing
I could be achieving you could be achieving he could be achieving we could be achieving you could be achieving they could be achieving
Perfeito
I could have achieved you could have achieved he could have achieved we could have achieved you could have achieved they could have achieved
Perfeito com V-ing
I could have been achieving you could have been achieving he could have been achieving we could have been achieving you could have been achieving they could have been achieving
Negação
Forma simple
I couldn't achieve you couldn't achieve he couldn't achieve we couldn't achieve you couldn't achieve they couldn't achieve
Forma com V-ing
I couldn't be achieving you couldn't be achieving he couldn't be achieving we couldn't be achieving you couldn't be achieving they couldn't be achieving
Perfeito
I couldn't have achieved you couldn't have achieved he couldn't have achieved we couldn't have achieved you couldn't have achieved they couldn't have achieved
Perfeito com V-ing
I couldn't have been achieving you couldn't have been achieving he couldn't have been achieving we couldn't have been achieving you couldn't have been achieving they couldn't have been achieving
Forma interrogativa
Forma simple
could I achieve? could you achieve? could he achieve? could we achieve? could you achieve? could they achieve?
Forma com V-ing
could I be achieving? could you be achieving? could he be achieving? could we be achieving? could you be achieving? could they be achieving?
Perfeito
could I have achieved? could you have achieved? could he have achieved? could we have achieved? could you have achieved? could they have achieved?
Perfeito com V-ing
could I have been achieving? could you have been achieving? could he have been achieving? could we have been achieving? could you have been achieving? could they have been achieving?
Forma interro-Negação
Forma simple
couldn't I achieve? couldn't you achieve? couldn't he achieve? couldn't we achieve? couldn't you achieve? couldn't they achieve?
Forma com V-ing
couldn't I be achieving? couldn't you be achieving? couldn't he be achieving? couldn't we be achieving? couldn't you be achieving? couldn't they be achieving?
Perfeito
couldn't I have achieved? couldn't you have achieved? couldn't he have achieved? couldn't we have achieved? couldn't you have achieved? couldn't they have achieved?
Perfeito com V-ing
couldn't I have been achieving? couldn't you have been achieving? couldn't he have been achieving? couldn't we have been achieving? couldn't you have been achieving? couldn't they have been achieving?