Question

Songs(to sing.)
Pr.s. - + ?
Past s. + - ?
Fut.s. +-?
Pr.Cont. +-?
Past Count. -+?
Fut.Cont.-+?
Pr. Perf +-?
Past perf +-?
Fut perf +-?
Pr.perf.cont

Answer 1

I sing songs
I sang songs
I will sing songs
I'm singing songs
I was singing songs
l'll singing songs
I have sung
I had sung
I'll have sung
I have been singing