
Verbe régulier : tighten -  tightened - tightened
Traduction française : resserrer - se resserrer 
Forme simple | Forme en V-ing | 
| I could tighten you could tighten she could tighten we could tighten you could tighten they could tighten  | I could be tightening you could be tightening she could be tightening we could be tightening you could be tightening they could be tightening  | 
Perfect | Perfect en V-ing | 
| I could have tightened you could have tightened she could have tightened we could have tightened you could have tightened they could have tightened  | I could have been tightening you could have been tightening she could have been tightening we could have been tightening you could have been tightening they could have been tightening  | 
Forme simple | Forme en V-ing | 
| I couldn't tighten you couldn't tighten she couldn't tighten we couldn't tighten you couldn't tighten they couldn't tighten  | I couldn't be tightening you couldn't be tightening she couldn't be tightening we couldn't be tightening you couldn't be tightening they couldn't be tightening  | 
Perfect | Perfect en V-ing | 
| I couldn't have tightened you couldn't have tightened she couldn't have tightened we couldn't have tightened you couldn't have tightened they couldn't have tightened  | I couldn't have been tightening you couldn't have been tightening she couldn't have been tightening we couldn't have been tightening you couldn't have been tightening they couldn't have been tightening  | 
Forme simple | Forme en V-ing | 
| could I tighten? could you tighten? could she tighten? could we tighten? could you tighten? could they tighten?  | could I be tightening? could you be tightening? could she be tightening? could we be tightening? could you be tightening? could they be tightening?  | 
Perfect | Perfect en V-ing | 
| could I have tightened? could you have tightened? could she have tightened? could we have tightened? could you have tightened? could they have tightened?  | could I have been tightening? could you have been tightening? could she have been tightening? could we have been tightening? could you have been tightening? could they have been tightening?  | 
Forme simple | Forme en V-ing | 
| couldn't I tighten? couldn't you tighten? couldn't she tighten? couldn't we tighten? couldn't you tighten? couldn't they tighten?  | couldn't I be tightening? couldn't you be tightening? couldn't she be tightening? couldn't we be tightening? couldn't you be tightening? couldn't they be tightening?  | 
Perfect | Perfect en V-ing | 
| couldn't I have tightened? couldn't you have tightened? couldn't she have tightened? couldn't we have tightened? couldn't you have tightened? couldn't they have tightened?  | couldn't I have been tightening? couldn't you have been tightening? couldn't she have been tightening? couldn't we have been tightening? couldn't you have been tightening? couldn't they have been tightening?  |