help me put this method in past tense plez...thanks for your help and sharing your knowlege..in advance..this mean alot to me.
Method:
-A few green leaves were cut into small pieces and placed in the motar.
-The pieces of green leaves were ground with purified sand in 3cm^3 of Ethanol,until a green extract was obtained.
-A spot of extract was placed 2cm from the end of the chromatography paper.More spots were added at the same point and allowed to dry.
-The paper having the green extract was then attached to a glass cover an suspended in the beaker containing the ethanol.
-The green spot was positioned above the surface of the ethanol and the bottom edge of the paper just below the surface.
-The solvent was allowed to move up the paper.After this,the chromatography was removed from the beaker and allowed to dry.
2007-01-28 12:26:18 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
it's already in the past tense. the use of words like "were" and "was" indicated this.
If it were in the present tense, "were" and "was" would be replaced by "is"
If in the future tense, "were" and "was" would be replaced by "shall be"
2007-02-01 10:49:50 · answer #1 · answered by live in stone 1 · 0⤊ 0⤋
What do you mean?. They are all in past tense and passive voice.
2007-01-28 20:32:15 · answer #2 · answered by Aldo 5 · 0⤊ 0⤋