must be sb doing 某人必须做.
see sb do是全过程,doing是看见某人正在做
watch sb 同上
hope to do sth,不能用hope sb to do sth句型 可以是hope +that 同位语从句.
如 His hope that he will have a large house one day is not impossible.
expect sb to do sth,希望某人可以做某事
must be sb doing 某人必须做.
see sb do是全过程,doing是看见某人正在做
watch sb 同上
hope to do sth,不能用hope sb to do sth句型 可以是hope +that 同位语从句.
如 His hope that he will have a large house one day is not impossible.
expect sb to do sth,希望某人可以做某事