in touch with sb
prep. phr..prep. phr.. to be in communication with someone by speaking or writing to them.
prep. phr.. to maintain or establish a state of communication with a specific person or group; functions as a predicative adjective phrase following a linking verb.
I am still in touch with my old school friends.
Please stay in touch with us while you are traveling across Europe this summer.
Despite the geographical distance and the passage of several decades, the former colleagues remained in touch with one another through regular correspondence.
usually follows the verbs 'be', 'keep', 'stay', or 'get'.
contrast 'get in touch' (the act of starting communication) with 'be in touch' (the state of ongoing communication); 'sb' stands for 'somebody' and indicates a human object is required.
I am in touch to him.I am in touch with him.the preposition 'with' is required to connect the phrase to the person being contacted.