Listen, repeat and remember.
[i:] – r$\mathbf{\text{ea}}$ch, t$\mathbf{\text{ea}}$m, cr$\mathbf{\text{ea}}$ture, s$\mathbf{\text{ea}}$l, b$\mathbf{\text{ea}}$ch, d$\mathbf{\text{ee}}$pest, centim$\mathbf{\text{e}}$ters
[ʌ] − m$\mathbf{\text{o}}$nth, n$\mathbf{\text{o}}$thing, s$\mathbf{\text{o}}$mething, aqual$\mathbf{\text{u}}$ng, $\mathbf{\text{u}}$nforgettable
[ɜ:] − f$\mathbf{\text{ir}}$st, s$\mathbf{\text{ur}}$face, res$\mathbf{\text{ear}}$ch, b$\mathbf{\text{ur}}$nt, t$\mathbf{\text{ur}}$tle
[ʤ] − dan$\mathbf{\text{g}}$erous, $\mathbf{\text{J}}$apan, intelli$\mathbf{\text{g}}$ent, ima$\mathbf{\text{g}}$e, $\mathbf{\text{ j}}$ellyfish