While / Newton / sit / under a tree, / an apple / fall / on his head.
While Newton was sitting under a tree, an apple fell on his head.
Alexander Fleming ________ (study) influenza when he ________ (discover) penicillin.
Alexander Fleming was studying influenza when he discovered penicillin
While Marie Curie _________ (work) in Paris, she _______ (find) a new element: Polonium.
While Marie Curie was working in Paris, she found a new element: Polonium.
Percy Spencer__________ (experiment) with a magnetron, when he _________ (realize) the potential of the magnetron.
Percy Spencer was experimenting with a magnetron when he realized the potential of this.
James Watson and Francis Crick _________ (work) together when they _______ (find) the double-helix DNA.
James Watson and Francis Crick were working together when they found the double-helix DNA.
Gustav Eiffel ______ (build) the Eiffel tower in 1889.
Gustav Eiffel built the Eiffel tower in 1889.
How do you say in English "Ella estaba estudiando ayer"?
She was studying yesterday.
How do you say in English "Ella estudió ayer"?
She studied yesterday
How do you say in English "Yo estaba jugando videojuegos cuando mi mamá se fue al trabajo"?
I was playing video games when my mom went to work
How do you say in English "Mientras ellos estaban leyendo, la maestra comió una manzana"?
While the were reading, the teacher ate an apple.
