优质解答
本词是形容词 因此：
1.做定语：a difficult task一次很难的任务.
2.作表语：this task is difficult.这次任务很难.
（注：普通形容词都可以如上用.）
3.句型：it is difficult for sb to do sth:做某事对某人来说很难.如：it is difficult for me to do the task.
4.名词是difficulty.句型：have difficulty (in) doing sth.如：i have difficulty (in) finishing the task.
本词是形容词 因此：
1.做定语：a difficult task一次很难的任务.
2.作表语：this task is difficult.这次任务很难.
（注：普通形容词都可以如上用.）
3.句型：it is difficult for sb to do sth:做某事对某人来说很难.如：it is difficult for me to do the task.
4.名词是difficulty.句型：have difficulty (in) doing sth.如：i have difficulty (in) finishing the task.