Verbo regular: sustain - sustained - sustained
Forma simple | Forma con V-ing |
I could sustain you could sustain he could sustain we could sustain you could sustain they could sustain | I could be sustaining you could be sustaining he could be sustaining we could be sustaining you could be sustaining they could be sustaining |
Perfecto | Perfecto con V-ing |
I could have sustained you could have sustained he could have sustained we could have sustained you could have sustained they could have sustained | I could have been sustaining you could have been sustaining he could have been sustaining we could have been sustaining you could have been sustaining they could have been sustaining |
Forma simple | Forma con V-ing |
I couldn't sustain you couldn't sustain he couldn't sustain we couldn't sustain you couldn't sustain they couldn't sustain | I couldn't be sustaining you couldn't be sustaining he couldn't be sustaining we couldn't be sustaining you couldn't be sustaining they couldn't be sustaining |
Perfecto | Perfecto con V-ing |
I couldn't have sustained you couldn't have sustained he couldn't have sustained we couldn't have sustained you couldn't have sustained they couldn't have sustained | I couldn't have been sustaining you couldn't have been sustaining he couldn't have been sustaining we couldn't have been sustaining you couldn't have been sustaining they couldn't have been sustaining |
Forma simple | Forma con V-ing |
could I sustain? could you sustain? could he sustain? could we sustain? could you sustain? could they sustain? | could I be sustaining? could you be sustaining? could he be sustaining? could we be sustaining? could you be sustaining? could they be sustaining? |
Perfecto | Perfecto con V-ing |
could I have sustained? could you have sustained? could he have sustained? could we have sustained? could you have sustained? could they have sustained? | could I have been sustaining? could you have been sustaining? could he have been sustaining? could we have been sustaining? could you have been sustaining? could they have been sustaining? |
Forma simple | Forma con V-ing |
couldn't I sustain? couldn't you sustain? couldn't he sustain? couldn't we sustain? couldn't you sustain? couldn't they sustain? | couldn't I be sustaining? couldn't you be sustaining? couldn't he be sustaining? couldn't we be sustaining? couldn't you be sustaining? couldn't they be sustaining? |
Perfecto | Perfecto con V-ing |
couldn't I have sustained? couldn't you have sustained? couldn't he have sustained? couldn't we have sustained? couldn't you have sustained? couldn't they have sustained? | couldn't I have been sustaining? couldn't you have been sustaining? couldn't he have been sustaining? couldn't we have been sustaining? couldn't you have been sustaining? couldn't they have been sustaining? |