we can tell time by a clock or by a watch .a clock is big;it is usually on the wall or the table. a watch is small; we can put it in the pocket or wear it on the weist!a clock or a watch usually has a round face. it has two hands , a long one and a short one. tom's clock can speak and call him to get up every day. his watch has a picture of a lovely dog on the face. he likes it very much.