When we talk about English we got mess in some words those look same in meaning but have a slight difference in usage.Lets clear the doubt in these words.
1. About and on
2. Above and over
3. Across and through
About Vs. on
Look at these two examples and try to diffrentiate these two words
- We had a discussion about money.
- He gave a lecture on finance.
About used in the first sentence suggests that the discussion was ordinary. On used in the second sentence suggests that the lecture was serious or academic, suitable for specialists.
Above vs. over
There is something interesting in these two words. lets have a look at given sentences, where we can use any of these words.The meaning of the sentence won't get changed.
Above and over can both mean ‘higher than’.
- The water came up above / over our waist.
Above is preferred when one thing is not directly over another.
- There is a temple above the lake. (The temple is not directly over the lake.) Over is preferred when one thing covers or touches another.
- He put on a sweater over his shirt. (NOT He put on a sweater above his shirt.)
In measurements of temperature and height we use above. In measurements of ages and speeds we use over.
- The temperature never rose above 5 degrees Celsius.
- You have to be over 18 to see that film.
Across vs. through
Through is used for movement in a three dimensional space, with things on all sides. Across cannot be used with that meaning.
Lets understand the difference from these examples
- We went through the wood. (We were in the wood.)
- The road goes through the forest.
- We walked across the desert. (We were on the desert.)