单词	tread
释义	verb | noun treadtread1 /trɛd/ ●○○ verb (past tense trod /trɑd/, past participle trodden /ˈtrɑdn/ or trod) Etymology ETYMOLOGYtread1 Origin: Old English tredan Verb Table VERB TABLE tread Simple Form Present I, you, we, they tread he, she, it treads Past I, you, he, she, it, we, they trod Present perfect I, you, we, they have trodden he, she, it has trodden Past perfect I, you, he, she, it, we, they had trodden Future I, you, he, she, it, we, they will tread Future perfect I, you, he, she, it, we, they will have trodden Continuous Form Present I am treading he, she, it is treading you, we, they are treading Past I, he, she, it was treading you, we, they were treading Present perfect I, you, we, they have been treading he, she, it has been treading Past perfect I, you, he, she, it, we, they had been treading Future I, you, he, she, it, we, they will be treading Future perfect I, you, he, she, it, we, they will have been treading 1tread carefully/warily/cautiously etc. to be very careful about what you say or do in a difficult situation:  Companies should tread carefully in this area.2tread water a)to stay floating upright in deep water by moving your legs as if you are riding a bicycle b)to make no progress in a particular situation, especially because you are waiting for something to happen3[intransitive always + adv./prep., transitive] old-fashioned to walk or step on something SYN step4tread the boards informal to work as an actor → see also fools rush in (where angels fear to tread) at fool1 (6) verb | noun treadtread2 noun 1 [countable, uncountable] the pattern of lines on the part of a tire that touches the road2[countable] the pattern of lines on the bottom of a shoe3[countable] the part of a stair that you put your foot on4[singular] old-fashioned the particular sound that someone makes when he or she walks
随便看	unrepeatable unrepentant unreported unrepresentative unrequited unreserved unreservedly unresolved unresponsive unrest unrestrained unrestrainedly unrestricted unripe unrivaled unroll unruffled unruliness unruly unsafe unsaid unsanitary unsatisfactory unsatisfied unsatisfying

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