Know (a fact) In Spanish Familiar Formal Comments Spain Latin America to know Present Imperfect Present Imperfect Preterit Future Conditional Subjective Subjective I know I used to know I knew I will know I would know I may know I might know you know you used to know you knew you will know you would know you may know you might know you know you used to know you knew you will know you would know you may know you might know he knows he used to know he knew he will know he would know he may know he might know she knows she used to know she knew she will know she would know she may know she might know we know we used to know we knew we will know we would know we may know we might know you all know you all used to know you all knew you all will know you all would know you all may know you all might know you all know you all used to know you all knew you all will know you all would know you all may know you all might know they know they used to know they knew they will know they would know they may know they might know Singular Familiar Command Singular Formal Command Plural Command in Spain Plural Command Latin America (you) Know! (you) Know! (you all) Know! (you all) Know! Don't (you) know! Don't (you) know! Don't (you all) know! Don't (you all) know! Gerund  knowing Past Participle  knew