Aspects of the disclosure provide methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. In a method, prediction information of a current block of a coding unit tree in a coded bit stream is decoded. The prediction information indicates at least one allowed block partitioning structure for the current block. A sub-block transform (SBT) mode is determined for the current block based on the prediction information indicating that SBT is used for the current block. A partition of the current block based on the SBT mode is different from a partition of the current block based on the at least one allowed block partitioning structure. The current block is reconstructed based on the SBT mode.