I'm going hiking for two hours.为什么这里要加for?

I'm going hiking for two hours.为什么这里要加for? I love going hiking I'm going mountains to go hiking 是否正确 YES, .I’m going to hiking this saturday的问句 i,going,hiking,weekend,usually,the,on I like going hiking,and my friend Tony likes going hiking,too.(合成一句)（ ）of ( )like going hiking.（ ）of ( )like going hiking. I'm going to go hiking the day after tomorrow.I hope that I will have a good time! 1.I’m going hiking in the mountains.(同义句) I will ________ _________ in the mountains.1.I’m going hiking in the mountains.(同义句)I will ________ _________ in the mountains. I'm going hiking.Would you like to go with____?A.me B.I C.mine D.my 1.She ______________( babysit) her sister tomorrow.1.She ______________( babysit) her sister tomorrow.2.I’m going c__________.3.I’m going hiking in the m____________.4.I don’t like going a______ for too long.5.He thought about ________ (leave) going away I'm going away for a holiday. 呆着一直等到该你们回家._______ _______ it’s time for you to go home.1.Why not go hiking in the mountains?(改为同义句）________ ________ go hiking in the mountains?2.I'm going to the park with my friends.(对my friends提问）_____ 英语翻译Tony:What are you doing for vacation,Lin Hua?Lin Hua:I'm going to Tibet for a week.Tony:That sounds ingteresting!What are you doing there?Lin Hua:I'mgoing hiking in the muntains.How about you,Tony?Ehat are you doing for vacation?Tony:I'm 英语填空,I'm going hiking with my friends next weekend.1.I'm going hiking with( my friends )next weekend.[就括号部分提问] ____ are you going hiking ____ next weekend?2.I have to (do the washing).[就括号部分提问] ____ ____ you ____ t I prefer ______( trek ) through the jungle to going hiking. I am going to do hiking.属于一般将来时吗? ---How about going hiking this weekend? ---Sorry---How about going hiking this weekend? ---Sorry ,I prefer ______ rather than ______. What's Tony doing for vacation?He's ----- A.going fishing B.going hiking 选什么