you want me to do somthing or I want somebody to do somthing

Question

siempre tengo dudas cuando quiero decir estas tipas de oraciones¨

you want me to do this? quieres que yo haga este?

you want me waiting for you here? quieres que esperate aquí?

I thought you did this by yourself. pensé que hiciste este por tu mismo.

I need you to solve this problem as sson as possbile. necesito que tu solucciona este problem cuando antes.

I would like to understand usages of verbos in this kind of sentences by showing me some sentences in spanish together with english translation, thanks in advance.

Answer 1

You want me to do this? = ¿Tu quieres que yo haga esto? = ¿Quieres que yo lo haga?
You want me waiting for you here? = ¿Tu quieres que yo espere por ti aquí? = ¿Quieres que te espere aquí?
I though you did this by yourself = Yo pensé que tu hiciste esto por ti mismo = Pensé que lo hiciste tu solo

Answer 2

I need you to solve this problem as sson as possbile. necesito que tu solucciona este problem cuando antes.

Your translation seems to be missing two often omitted words...por favor. (tú, no tu) (soluciona, no solucciona)(problema, no problem)

Words that imply commands ( deseo, mando, pido) as well as those that show emotion (espero, temo, siento) often require the subjunctive in the following clause. It all depends on the amount of doubt concerning the probability of fulfillment. Not sure here how much doubt you wish to express concerning finding the solution so I can't say for sure whether this sentence needs the subjunctive. Ask a native what sounds correct.