Regular verb: think back - think backed - think backed
Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may think back you may think back he may think back we may think back you may think back they may think back
V-ing form
I may be think backing you may be think backing he may be think backing we may be think backing you may be think backing they may be think backing
Perfect
I may have think backed you may have think backed he may have think backed we may have think backed you may have think backed they may have think backed
V-ing perfect
I may have been think backing you may have been think backing he may have been think backing we may have been think backing you may have been think backing they may have been think backing
Negation
Simple form
I mayn't think back you mayn't think back he mayn't think back we mayn't think back you mayn't think back they mayn't think back
V-ing form
I mayn't be think backing you mayn't be think backing he mayn't be think backing we mayn't be think backing you mayn't be think backing they mayn't be think backing
Perfect
I mayn't have think backed you mayn't have think backed he mayn't have think backed we mayn't have think backed you mayn't have think backed they mayn't have think backed
V-ing perfect
I mayn't have been think backing you mayn't have been think backing he mayn't have been think backing we mayn't have been think backing you mayn't have been think backing they mayn't have been think backing
Interrogative form
Simple form
may I think back? may you think back? may he think back? may we think back? may you think back? may they think back?
V-ing form
may I be think backing? may you be think backing? may he be think backing? may we be think backing? may you be think backing? may they be think backing?
Perfect
may I have think backed? may you have think backed? may he have think backed? may we have think backed? may you have think backed? may they have think backed?
V-ing perfect
may I have been think backing? may you have been think backing? may he have been think backing? may we have been think backing? may you have been think backing? may they have been think backing?
Interro-negative form
Simple form
mayn't I think back? mayn't you think back? mayn't he think back? mayn't we think back? mayn't you think back? mayn't they think back?
V-ing form
mayn't I be think backing? mayn't you be think backing? mayn't he be think backing? mayn't we be think backing? mayn't you be think backing? mayn't they be think backing?
Perfect
mayn't I have think backed? mayn't you have think backed? mayn't he have think backed? mayn't we have think backed? mayn't you have think backed? mayn't they have think backed?
V-ing perfect
mayn't I have been think backing? mayn't you have been think backing? mayn't he have been think backing? mayn't we have been think backing? mayn't you have been think backing? mayn't they have been think backing?