could cling
Irregular verb: cling - clung- clung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cling
you could cling
she could cling
we could cling
you could cling
they could cling 	I could be clinging
you could be clinging
she could be clinging
we could be clinging
you could be clinging
they could be clinging	I could have clung
you could have clung
she could have clung
we could have clung
you could have clung
they could have clung	I could have been clinging
you could have been clinging
she could have been clinging
we could have been clinging
you could have been clinging
they could have been clinging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't cling
you couldn't cling
she couldn't cling
we couldn't cling
you couldn't cling
they couldn't cling 	I couldn't be clinging
you couldn't be clinging
she couldn't be clinging
we couldn't be clinging
you couldn't be clinging
they couldn't be clinging	I couldn't have clung
you couldn't have clung
she couldn't have clung
we couldn't have clung
you couldn't have clung
they couldn't have clung	I couldn't have been clinging
you couldn't have been clinging
she couldn't have been clinging
we couldn't have been clinging
you couldn't have been clinging
they couldn't have been clinging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cling?
could you cling?
could she cling?
could we cling?
could you cling?
could they cling? 	could I be clinging?
could you be clinging?
could she be clinging?
could we be clinging?
could you be clinging?
could they be clinging? 	could I have clung?
could you have clung?
could she have clung?
could we have clung?
could you have clung?
could they have clung? 	could I have been clinging?
could you have been clinging?
could she have been clinging?
could we have been clinging?
could you have been clinging?
could they have been clinging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I cling?
couldn't you cling?
couldn't she cling?
couldn't we cling?
couldn't you cling?
couldn't they cling? 	couldn't I be clinging?
couldn't you be clinging?
couldn't she be clinging?
couldn't we be clinging?
couldn't you be clinging?
couldn't they be clinging? 	couldn't I have clung?
couldn't you have clung?
couldn't she have clung?
couldn't we have clung?
couldn't you have clung?
couldn't they have clung? 	couldn't I have been clinging?
couldn't you have been clinging?
couldn't she have been clinging?
couldn't we have been clinging?
couldn't you have been clinging?
couldn't they have been clinging?