[en] The coupled-channels method to treat the deuteron breakup process is applied to the elastic scattering and the transferred and breakup reactions. For /sup 40/Ca(d/sup →/,d)/sup 40/Ca at 56 MeV, the method successfully reproduces the data on the cross section and the vector and tensor analyzing powers. The breakup effect on the elastic scattering is important especially for the cross section and the vector-analyzing power. In the (p/sup →/,d) reaction on /sup 208//sub Pb/ at 22 MeV, conventional DWBA is good for the final state /sup 207/Pb (2p1/2, gr) with good momentum matching, but not for /sup 207/Pb)0i13/2) with poor momentum matching. The adiabatic approximation prescription is good for both final states of /sup 207/Pb(2p1/2,gr) and /sup 207/(Pb)0i13/2). For the (d,pn) reaction at 90 MeV, two types of characteristics breakup processes are theoretically found