The past tense of catalyse is catalysed
| Infinitive | to catalyse |
| Present Tense | catalyse / catalyses |
| Past Tense | catalysed |
| Present Participle | catalysing |
| Past Participle | catalysed |
| Singular | Plural |
|---|---|
| I catalyse | We catalyse |
| You catalyse | You catalyse |
| He/She/It catalyses | They catalyse |
| Singular | Plural |
|---|---|
| I am catalysing | We are catalysing |
| You are catalysing | You are catalysing |
| He/She/It is catalysing | They are catalysing |
| Singular | Plural |
|---|---|
| I have catalysed | We have catalysed |
| You have catalysed | You have catalysed |
| He/She/It has catalysed | They have catalysed |
| Singular | Plural |
|---|---|
| I have been catalysing | We have been catalysing |
| You have been catalysing | You have been catalysing |
| He/She/It has been catalysing | They have been catalysing |
| Singular | Plural |
|---|---|
| I catalysed | We catalysed |
| You catalysed | You catalysed |
| He/She/It catalysed | They catalysed |
| Singular | Plural |
|---|---|
| I was catalysing | We were catalysing |
| You were catalysing | You were catalysing |
| He/She/It was catalysing | They were catalysing |
| Singular | Plural |
|---|---|
| I had catalysed | We had catalysed |
| You had catalysed | You had catalysed |
| He/She/It had catalysed | They had catalysed |
| Singular | Plural |
|---|---|
| I had been catalysing | We had been catalysing |
| You had been catalysing | You had been catalysing |
| He/She/It had been catalysing | They had been catalysing |
| Singular | Plural |
|---|---|
| I will catalyse | We will catalyse |
| You will catalyse | You will catalyse |
| He/She/It will catalyse | They will catalyse |
| Singular | Plural |
|---|---|
| I will be catalysing | We will be catalysing |
| You will be catalysing | You will be catalysing |
| He/She/It will be catalysing | They will be catalysing |
| Singular | Plural |
|---|---|
| I will have catalysed | We will have catalysed |
| You will have catalysed | You will have catalysed |
| He/She/It will have catalysed | They will have catalysed |
| Singular | Plural |
|---|---|
| I will have been catalysing | We will have been catalysing |
| You will have been catalysing | You will have been catalysing |
| He/She/It will have been catalysing | They will have been catalysing |
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