if /ɪf/ CONJ You use if in conditional sentences to introduce the circumstances in which an event or situation might happen, might be happening, or might have happened; 条件从句 She gets very upset if I exclude her from anything. You can go if you want. We’ll be late if you don’t hurry. CONJ （表假设）要是，假如；If it rains, we will cancel the picnic; If it rained, you’d get wet; If it had rained, we would have stayed inside; conj.无论何时；虽然，即使；（用于间接疑问）是否；（用于礼貌问询）是否；当，每次；（与情态动词连用）表婉转客气；这不是……，要是……多好；或许不；就算；尽管 n. 条件，设想；不确定的情况
If I remember correctly! 如果我记得没错的话！
- If you need to read something far away and don’t have your glasses, use your phone camera.