Conjugação do verbo inglês
COULD OSCILLATE

Verbo regular: oscillate - oscillated - oscillated

Afirmação

Forma simple	Forma com V-ing
I could oscillate you could oscillate he could oscillate we could oscillate you could oscillate they could oscillate	I could be oscillating you could be oscillating he could be oscillating we could be oscillating you could be oscillating they could be oscillating
Perfeito	Perfeito com V-ing
I could have oscillated you could have oscillated he could have oscillated we could have oscillated you could have oscillated they could have oscillated	I could have been oscillating you could have been oscillating he could have been oscillating we could have been oscillating you could have been oscillating they could have been oscillating

Negação

Forma simple	Forma com V-ing
I couldn't oscillate you couldn't oscillate he couldn't oscillate we couldn't oscillate you couldn't oscillate they couldn't oscillate	I couldn't be oscillating you couldn't be oscillating he couldn't be oscillating we couldn't be oscillating you couldn't be oscillating they couldn't be oscillating
Perfeito	Perfeito com V-ing
I couldn't have oscillated you couldn't have oscillated he couldn't have oscillated we couldn't have oscillated you couldn't have oscillated they couldn't have oscillated	I couldn't have been oscillating you couldn't have been oscillating he couldn't have been oscillating we couldn't have been oscillating you couldn't have been oscillating they couldn't have been oscillating

Forma interrogativa

Forma simple	Forma com V-ing
could I oscillate? could you oscillate? could he oscillate? could we oscillate? could you oscillate? could they oscillate?	could I be oscillating? could you be oscillating? could he be oscillating? could we be oscillating? could you be oscillating? could they be oscillating?
Perfeito	Perfeito com V-ing
could I have oscillated? could you have oscillated? could he have oscillated? could we have oscillated? could you have oscillated? could they have oscillated?	could I have been oscillating? could you have been oscillating? could he have been oscillating? could we have been oscillating? could you have been oscillating? could they have been oscillating?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I oscillate? couldn't you oscillate? couldn't he oscillate? couldn't we oscillate? couldn't you oscillate? couldn't they oscillate?	couldn't I be oscillating? couldn't you be oscillating? couldn't he be oscillating? couldn't we be oscillating? couldn't you be oscillating? couldn't they be oscillating?
Perfeito	Perfeito com V-ing
couldn't I have oscillated? couldn't you have oscillated? couldn't he have oscillated? couldn't we have oscillated? couldn't you have oscillated? couldn't they have oscillated?	couldn't I have been oscillating? couldn't you have been oscillating? couldn't he have been oscillating? couldn't we have been oscillating? couldn't you have been oscillating? couldn't they have been oscillating?