I don't understand this sentence. I'd like an explanation.
The sentence is:

After the machine has ground the surface of the object down it is polished.

1) Which verb is it in the first part : ground or grind?
2) Could you rewrite the whole sentence in other words so that it is simplified?

I can't quite understand the meaning. To me it looks like there is a punctuation mistake but I'm no native speaker so...

Question

I don't understand this sentence. I'd like an explanation.
The sentence is:

After the machine has ground the surface of the object down it is polished.

1) Which verb is it in the first part : ground or grind?
2) Could you rewrite the whole sentence in other words so that it is simplified?

I can't quite understand the meaning. To me it looks like there is a punctuation mistake but I'm no native speaker so...

Answer

Oi, hello,
the verb is "to grind down" (Após a máquina ter limado a superfície...)
Concordo com você, falta uma vírgula: "...down, it is polished".

Answer

You could add a comma after down which would help clarify a little.
The use of ground is correct in this particular sentence.

It might read slightly clearer if stated like this though:

After the machine has ground down the surface of the object, it is polished. 
 
OR

The machine polishes the object by grinding down its surface.

Answers · 3