Mimi,
You could have also said,
They used to build houses using mud and straw because...
I say:
They used to build houses of mud and straw because they didn't have cement.
This time I used "of mud and straw", I didn't use "by" or "with". I really don't understand. It is strange to me.
Please tell me if this sentence is right?
Thanks.
Joelline,
You help me a lot. Thank you very much.
I would like to ask you about the sentence above:
* What kind of the word "using"? Is it a present participle? Is it replaced a another clause?
Thanks.