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Inventions and Discoveries
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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.
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Alexander Fleming ________ (study) influenza when he ________ (discover) penicillin.
Alexander Fleming was studying influenza when he discovered penicillin
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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.
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How do you say in English "Ella estudió ayer"?
She studied yesterday
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How do you say in English "Ella estaba estudiando ayer"?
She was studying yesterday.
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How do you say in English "Mientras ellos estaban leyendo, la maestra comió una manzana"?
While the were reading, the teacher ate an apple.
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We use past _______________ after "when"
simple
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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
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We use past _______________ after "while"
continuous
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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.
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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.
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Gustav Eiffel ______ (build) the Eiffel tower in 1889.
Gustav Eiffel built the Eiffel tower in 1889.
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