I could theorise you could theorise he could theorise we could theorise you could theorise they could theorise
Forma com V-ing
I could be theorising you could be theorising he could be theorising we could be theorising you could be theorising they could be theorising
Perfeito
I could have theorised you could have theorised he could have theorised we could have theorised you could have theorised they could have theorised
Perfeito com V-ing
I could have been theorising you could have been theorising he could have been theorising we could have been theorising you could have been theorising they could have been theorising
Negação
Forma simple
I couldn't theorise you couldn't theorise he couldn't theorise we couldn't theorise you couldn't theorise they couldn't theorise
Forma com V-ing
I couldn't be theorising you couldn't be theorising he couldn't be theorising we couldn't be theorising you couldn't be theorising they couldn't be theorising
Perfeito
I couldn't have theorised you couldn't have theorised he couldn't have theorised we couldn't have theorised you couldn't have theorised they couldn't have theorised
Perfeito com V-ing
I couldn't have been theorising you couldn't have been theorising he couldn't have been theorising we couldn't have been theorising you couldn't have been theorising they couldn't have been theorising
Forma interrogativa
Forma simple
could I theorise? could you theorise? could he theorise? could we theorise? could you theorise? could they theorise?
Forma com V-ing
could I be theorising? could you be theorising? could he be theorising? could we be theorising? could you be theorising? could they be theorising?
Perfeito
could I have theorised? could you have theorised? could he have theorised? could we have theorised? could you have theorised? could they have theorised?
Perfeito com V-ing
could I have been theorising? could you have been theorising? could he have been theorising? could we have been theorising? could you have been theorising? could they have been theorising?
Forma interro-Negação
Forma simple
couldn't I theorise? couldn't you theorise? couldn't he theorise? couldn't we theorise? couldn't you theorise? couldn't they theorise?
Forma com V-ing
couldn't I be theorising? couldn't you be theorising? couldn't he be theorising? couldn't we be theorising? couldn't you be theorising? couldn't they be theorising?
Perfeito
couldn't I have theorised? couldn't you have theorised? couldn't he have theorised? couldn't we have theorised? couldn't you have theorised? couldn't they have theorised?
Perfeito com V-ing
couldn't I have been theorising? couldn't you have been theorising? couldn't he have been theorising? couldn't we have been theorising? couldn't you have been theorising? couldn't they have been theorising?