Once in the UK with leave as a Spouse, you can apply to extend this leave, providing that you meet the requirements set out in Appendix FM of the Immigration Rules for an extension of stay in this category.
The requirements for further leave to remain in the UK as a spouse are broadly the same as those that apply to initial applications in the spouse visa category. However, you will need to make sure that your application satisfies the suitability, relationship, financial, accommodation, and Immigration status requirements again. A higher level English language requirement will also apply.